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C Programing File

C Programing File For First Year B. Tech Students

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C Practical File (For B-Tech) By Harsh Singhvi

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Index

  1. Program to find the sum of two numbers
  2. Program to find area and circumference of circle
  3. Program to find the simple interest
  4. Program to convert temperature from degree centigrade to Fahrenheit
  5. Program to calculate sum of 5 subjects and find percentage
  6. Program to swap two numbers with third variable
  7. Program to swap two numbers without third variable
  8. Program to Check Number is Even or Odd
  9. Program to Check Leap Year
  10. Program to Find the Greatest of three Numbers
  11. Program to display Monday to Sunday using Switch Statement
  12. Program for Arithmetic Operations using Switch Statement
  13. Program to use conditional operator
  14. Program to show Bitwise AND Operator between two integers
  15. Program to shift the input data by two bits to left
  16. Program to print sum and average of First n Natural Numbers
  17. Program to find Factorial using loop
  18. Program to print first n elements of Fibonacci Series
  19. Program to Print Multiplication Table of number
  20. Program to Reverse an Integer
  21. Program to check Armstrong Number
  22. Program to print star Sequence 1
  23. Program to print star Sequence 2
  24. Program to print star Sequence 3
  25. Program to Check Whether Number is Prime or not
  26. Program to display an Array
  27. Program to find the Maximum Number in an Array
  28. Program to print sum & average of 10 elements of an Array
  29. Program to Display Matrix
  30. Program to find sum of two Matrices
  31. Program to find transpose of a Matrix
  32. Program to find factorial of a number using Functions
  33. Program to find multiplication of a two Matrix
  34. Program to swap two numbers using Functions
  35. Program to find square of a number using Functions
  36. Program to show Call by Value
  37. Program to show call by Reference
  38. Program to find factorial of a number using recursion
  39. Program to show input and output of a string
  40. Program to find whether a string is Palindrome or not
  41. Program to print the roll number, name, age and marks of a student using structures
  42. Program to add two numbers using Pointers
  43. Program to subtract two number using pointers
  44. Program to search an element in the array using Linear Search
  45. Program to implement Linked List

1. AIM: Program to find the sum of two numbers.

Code:

#include<stdio.h>

int main() {
   int a, b, sum;

   printf("\nEnter two no: ");
   scanf("%d %d", &a, &b);

   sum = a + b;

   printf("Sum : %d", sum);

   return(0);
}

Output:

Enter two no: 5 6
Sum : 11

2. AIM: Program to find area and circumference of circle.

Code:

#include<stdio.h>
 
int main() {
 
   int rad;
   float PI = 3.14, area, ci;
 
   printf("\nEnter radius of circle: ");
   scanf("%d", &rad);
 
   area = PI * rad * rad;
   printf("\nArea of circle : %f ", area);
 
   ci = 2 * PI * rad;
   printf("\nCircumference : %f ", ci);
 
   return (0);
}

Output:

Enter radius of a circle : 1
Area of circle : 3.14
Circumference  : 6.28

3. AIM: Program to find the simple interest.

Code:

#include<stdio.h>

int main() {
   int amount, rate, time, si;

   printf("\nEnter Principal Amount : ");
   scanf("%d", &amount);

   printf("\nEnter Rate of Interest : ");
   scanf("%d", &rate);

   printf("\nEnter Period of Time   : ");
   scanf("%d", &time);

   si = (amount * rate * time) / 100;
   printf("\nSimple Interest : %d", si);

   return(0);
}

Output:

Enter Principal Amount : 500
Enter Rate of interest : 5
Enter Period of Time   : 2
Simple Interest : 50

4. AIM: Program to convert temperature from degree centigrade to Fahrenheit.

Code:

#include<stdio.h>
 
int main() {
 float celsius, fahrenheit;
 
 printf("\nEnter temp in Celsius : ");
 scanf("%f", &celsius);
 
 fahrenheit = (1.8 * celsius) + 32;
 printf("\nTemperature in Fahrenheit : %f ", fahrenheit);
 
 return (0);
}

Output:

Enter temp in Celsius : 32
Temperature in Fahrenheit : 89.59998

5. AIM: Program to calculate sum of 5 subjects and find percentage.

Code:

#include<stdio.h>
 
int main() {
   int s1, s2, s3, s4, s5, sum, total = 500;
   float per;
 
   printf("\nEnter marks of 5 subjects : ");
   scanf("%d %d %d %d %d", &s1, &s2, &s3, &s4, &s5);
 
   sum = s1 + s2 + s3 + s4 + s5;
   printf("\nSum : %d", sum);
 
   per = (sum * 100) / total;
   printf("\nPercentage : %f", per);
 
   return (0);
}

Output:

Enter marks of 5 subjects : 80 70 90 80 80
Sum : 400
Percentage : 80.00

6. AIM: Program to swap two numbers with third variable.

Code:

#include<stdio.h>
int main() {
      double first, second, temp;
      printf("Enter first number: ");
      scanf("%lf", &first);
      printf("Enter second number: ");
      scanf("%lf", &second);
      temp = first;
      first = second;
      second = temp;
      printf("\nAfter swapping, firstNumber = %.2lf\n", first);
      printf("After swapping, secondNumber = %.2lf", second);
      return 0;
}

Output:

Enter first number: 1.20
Enter second number: 2.45

After swapping, firstNumber = 2.45
After swapping, secondNumber = 1.20

7. AIM: Program to swap two numbers without third variable.

Code:

#include<stdio.h>  
 int main()    
{    
int a=10, b=20;      
printf("Before swap a=%d b=%d",a,b);      
a=a+b;    
b=a-b;   
a=a-b;   
printf("\nAfter swap a=%d b=%d",a,b);    
return 0;  
}

Output:

Before swap a=10 b=20
After swap a=20 b=10

8. AIM: Program to Check Number is Even or Odd.

Code:

#include <stdio.h>
int main() {
    int num;
    printf("Enter an integer: ");
    scanf("%d", &num);

    if(num % 2 == 0)
        printf("%d is even.", num);
    else
        printf("%d is odd.", num);
    
    return 0;
}

Output:

Enter an integer: -7
-7 is odd.

9. AIM: Program to Check Leap Year.

Code:

#include <stdio.h>
int main() {
   int year;
   printf("Enter a year: ");
   scanf("%d", &year);

   if (year % 400 == 0) {
      printf("%d is a leap year.", year);
   }
   else if (year % 100 == 0) {
      printf("%d is not a leap year.", year);
   }
   else if (year % 4 == 0) {
      printf("%d is a leap year.", year);
   }
   else {
      printf("%d is not a leap year.", year);
   }

   return 0;
}

Output:

Enter a year: 1900
1900 is not a leap year.

10. AIM: Program to Find the Greatest of three Numbers.

Code:

#include <stdio.h>
int main() {
    double n1, n2, n3;
    printf("Enter three different numbers: ");
    scanf("%lf %lf %lf", &n1, &n2, &n3);

    if (n1 >= n2 && n1 >= n3)
        printf("%.2f is the largest number.", n1);
    if (n2 >= n1 && n2 >= n3)
        printf("%.2f is the largest number.", n2);
    if (n3 >= n1 && n3 >= n2)
        printf("%.2f is the largest number.", n3);

    return 0;
}

Output:

Enter three numbers: -4.5
3.9
5.6
5.60 is the largest number.

11. AIM: Program to display Monday to Sunday using Switch Statement.

Code:

#include<stdio.h>
#include<conio.h>
int main()
{
int num;
printf("Enter a no.: ");
scanf("%d",&num);
switch(num)
{
    case 1: printf("Monday");
            break;
    case 2: printf("Tuesday");
            break;
    case 3: printf("Wednesday");
            break;
    case 4: printf("Thursday");
            break;
    case 5: printf("Friday");
            break;
    case 6: printf("Saturday");
            break;
    case 7: printf("Sunday");
            break;
    default:    printf("You have entered a wrong choice.");
                break;
}
return 0;

}

Output:

Enter a no.: 1
Monday

12. AIM: Program for Arithmetic Operations using Switch Statement.

Code:

#include<stdio.h>
#include<conio.h>
int main()
{
    int a,b;
    int op;
    printf(" 1.Addition\n 2.Subtraction\n 3.Multiplication\n 4.Division\n");
    printf("Enter the values of a & b: ");
    scanf("%d %d",&a,&b);
    printf("Enter your Choice : ");
    scanf("%d",&op);
    switch(op)
    {
    case 1	:
        printf("Sum of %d and %d is : %d",a,b,a+b);
        break;
    case 2	:
        printf("Difference of %d and %d is : %d",a,b,a-b);
        break;
    case 3	:
        printf("Multiplication of %d and %d is : %d",a,b,a*b);
        break;
    case 4	:
        printf("Division of Two Numbers is %d : ",a/b);
        break;
    default	:
        printf(" Enter Your Correct Choice.");
        break;
    }
    return 0;
}

Output:

 1.Addition
 2.Subtraction
 3.Multiplication
 4.Division
Enter the values of a & b:  20 15
Enter your Choice : 1
Sum of 20 and 15 is : 35

13. AIM: Program to use conditional operator.

Code:

#include<stdio.h>
#include<conio.h>
int main()
{
    int a, b, Greatest;
    printf("Enter two numbers: ");
    scanf("%d", &a);
    scanf("%d", &b);
    Greatest = (a >= b) ? a : b;
    printf("Greatest = %d", Greatest);
    return 0;
}

Output:

Enter two numbers: 12 1
Greatest = 12

14. AIM: Program to show Bitwise AND Operator between two integers.

Code:

#include<stdio.h>
#include<conio.h>
int main()
{
    int a, b, bitwiseAND;
    printf("Enter two numbers: ");
    scanf("%d", &a);
    scanf("%d", &b);
    bitwiseAND =  a&b; 
    printf("Bitwise AND = %d", bitwiseAND);
    return 0;
}

Output:

Enter two numbers: 12 25
Bitwise AND = 8

15. AIM: Program to shift the input data by two bits to left.

Code:

#include<stdio.h>
#include<conio.h>
int main()
{
    int a;
    printf("Enter a number: ");
    scanf("%d", &a);
    printf("Data Shifted by 2 bits to left = %d", a << 2);
    return 0;
}

Output:

Enter a number: 2
Data Shifted by 2 bits to left = 8

16. AIM: Program to print sum and average of First n Natural Numbers.

Code:

#include<stdio.h>
 
int main() {
   int i = 1, n, sum=0;
   printf("Enter Number: ");
   scanf("%d", &n);
 
   for (i = 1; i <= n; i++) {
      sum += i;
   }

   printf("SUM = %d", sum);
   printf("AVG = %d", sum/n);

   return (0);
}

Output:

Enter Number: 3
SUM = 6
AVG = 2

17. AIM: Program to find Factorial using loop.

Code:

#include<stdio.h>  
int main()    
{    
    int i,fact=1,number;    
    printf("Enter a number: ");    
    scanf("%d",&number);    
    for(i=1;i<=number;i++){    
        fact=fact*i;    
    }    
    printf("Factorial of %d is: %d",number,fact);    
    return 0;  
}

Output:

Enter a number: 5
Factorial of 5 is: 120

18. AIM: Program to print first n elements of Fibonacci Series.

Code:

#include<stdio.h>    
int main()    
{    
    int n1=0,n2=1,n3,i,number;    
    printf("Enter the number of elements:");    
    scanf("%d",&number);    
    printf("\n%d %d",n1,n2);  
    for(i=2;i<number;++i)    
    {    
        n3=n1+n2;    
        printf(" %d",n3);    
        n1=n2;    
        n2=n3;
    }  
        return 0;  
}

Output:

Enter the number of elements:15
0 1 1 2 3 5 8 13 21 34 55 89 144 233 377

19. AIM: Program to Print Multiplication Table of number.

Code:

#include <stdio.h>
int main() {
    int n, i;
    printf("Enter an integer: ");
    scanf("%d", &n);
    for (i = 1; i <= 10; ++i) {
        printf("%d * %d = %d \n", n, i, n * i);
    }
    return 0;
}

Output:

Enter an integer: 9
9 * 1 = 9
9 * 2 = 18
9 * 3 = 27
9 * 4 = 36
9 * 5 = 45
9 * 6 = 54
9 * 7 = 63
9 * 8 = 72
9 * 9 = 81
9 * 10 = 90

20. AIM: Program to Reverse an Integer.

Code:

#include <stdio.h>
int main() {
    int n, rev = 0, remainder;
    printf("Enter an integer: ");
    scanf("%d", &n);
    while (n != 0) {
        remainder = n % 10;
        rev = rev * 10 + remainder;
        n /= 10;
    }
    printf("Reversed number = %d", rev);
    return 0;
}

Output:

Enter an integer: 2345
Reversed number = 5432

21. AIM: Program to check Armstrong Number.

Code:

#include<stdio.h>  
int main()    
{    
    int n,r,sum=0,temp;    
    printf("enter the number: ");    
    scanf("%d",&n);    
    temp=n;    
    while(n>0)    
    {    
        r=n%10;    
        sum=sum+(r*r*r);    
        n=n/10;    
    }    
    if(temp==sum)    
        printf("armstrong  number ");    
    else    
        printf("not armstrong number");    
    return 0;  
}

Output:

enter the number: 153
armstrong number

22. AIM: Program to print star Sequence 1.

Code:

#include<stdio.h>
#include<conio.h>
int main()
{
    int i,j;
    for(i=1;i<=5;i++)
    {
        for(j=1; j<=i ; j++)
        {
            printf("*");
        }
    printf("\n");
    }
return 0;
}

Output:

*
**
***
****
*****

23. AIM: Program to print star Sequence 2.

Code:

#include<stdio.h>
#include<conio.h>
int main()
{
    int i,j,k;
    for(i=1; i<=5 ; i++)
    {
        for(j=5; j>=i ; j--)
        {
            printf(" ");
        }
        for(k=1; k<=i ; k++)
        {
            printf("*");
        }
    printf("\n");
    }
    return 0;
}

Output:

    *
   **
  ***
 ****
*****

24. AIM: Program to print star Sequence 3.

Code:

#include<stdio.h>
#include<conio.h>
int main()
{
    int i,j,k;
    for(i=1; i<=5; i++)
    {
        for(j=5; j>=i ; j--)
        printf(" ");
        {
        for(k=1; k<=i*2-1; k++)
        printf("*");
        }
        printf("\n");
    }
    return 0;
}

Output:

     *
    ***
   *****
  *******
 *********

25. AIM: Program to Check Whether Number is Prime or not.

Code:

#include<stdio.h>
 
int main() {
   int num, i, count = 0;
 
   printf("Enter a number: ");
   scanf("%d", &num);
 
   for (i = 2; i <= num / 2; i++) {
      if (num % i == 0) {
         count++;
         break;
      }
   }
 
   if (count == 0)
      printf("%d is a prime number", num);
   else
      printf("%d is not a prime number", num);
 
   return 0;
}

Output:

Enter a number: 12
12 is not a prime number

26. AIM: Program to display an Array.

Code:

#include<stdio.h>
#include<conio.h>
int main()
{
    int a[5],i;
    printf("enter elements of an array: ");
    
    for(i=0;i<5;i++)
    {
        scanf("%d",&a[i]);
    }
    
    for(i=1;i<5;i++)
    {
        printf("Elements = %d",a[i]);
    }
}

Output:

enter elements of an array:
5
4
7
1
2
Elements = 5 4 7 1 2

27. AIM: Program to find the Maximum Number in an Array.

Code:

#include<stdio.h>
#include<conio.h>
int main()
{
int a[5],max,i;

    printf("enter element for the array:"); 
    for(i=0;i<5;i++)
    {
        scanf("%d",&a[i]);
    }
    max=a[0];
    for(i=1;i<5;i++)
    {
        if(max<a[i])
        {
            max=a[i];
        }
    }
    printf("maximum no = %d",max);
}

Output:

enter elements for array:
5
4
7
1
2
maximum no = 7

28. AIM: Program to print sum & average of 10 elements of an Array.

Code:

#include<stdio.h> 
#include<conio.h>
int main() {
    int a[10],i,sum=0;
    float av;
    printf("enter elements of an array: "); 
    for(i=0;i<10;i++)
    { 
        scanf("%d",&a[i]); 
    } 
    for(i=0;i<10;i++) {
        sum=sum+a[i];
    }
    printf("sum=%d",sum); 
    av=sum/10; 
    printf("average=%.2f",av);
    return 0;
}

Output:

enter elements of an array:
4
5
6
1
2
3
5
5
4
7 
sum=42
average=4.22

29. AIM: Program to Display Matrix.

Code:

#include<stdio.h>
#include<conio.h> 

int main()
{
    int a[3][2],b[3][2],i,j;
    printf("enter value for a matrix: ");
    for(i=0;i<3;i++)
    {
        for(j=0;j<2;j++) 
            scanf("%d",&a[i][j]); 
    }
    
    printf("enter value for b matrix: ");
    for(i=0;i<3;i++)
    {
        for(j=0;j<2;j++) scanf("%d",&b[i][j]); 
    }
    printf("\na matrix is\n\n");
    for(i=0;i<3;i++) 
    {
        for(j=0;j<2;j++) 
        {
            printf(" %d ",a[i][j]);
        }
        printf("\n");
    }
    printf("\nb matrix is\n\n");
    for(i=0;i<3;i++) 
    { 
        for(j=0;j<2;j++) 
        {
            printf(" %d ",b[i][j]); 
        }
        printf("\n");
    }
    return 0;
}

Output:

enter value for a matrix:
7
8
9
4 
5 
6

enter value for b matrix:
3 
2 
1 
4 
5 
6

a matrix is
7 8 
9 4 
5 6

b matrix is
3 2 
1 4 
5 6

30. AIM: Program to find sum of two Matrices.

Code:

#include<stdio.h> 
#include<conio.h>

int main()
{
    int a[3][2], b[3][2] ,c[3][2] ,i , j;
    printf("Enter value for 1 matrix:");
    for(i=0;i<3;i++)
    {
        for(j=0;j<2;j++) 
            scanf("%d",&a[i][j]); 
    }
    
    printf("Enter value for 2 matrix:"); 
    
    for(i=0;i<3;i++)
    {
        for(j=0;j<2;j++) 
            scanf("%d",&b[i][j]); 
    
    }
    
    for(i=0;i<3;i++)
    {
        for(j=0;j<2;j++) 
            c[i][j]=a[i][j]+b[i][j];
    }
    printf("Sum of matrix is\n");
    for(i=0;i<3;i++)
    {
        for(j=0;j<2;j++)
        { 
            printf("%d\t",c[i][j]); 
        }
        printf("\n"); 
    }
    return 0;
}

Output:

Enter value for 1 matrix: 
1
2
3
4
5
6

Enter value for 2 matrix: 
4
5 
6 
1 
3 
2

Sum of matrixis 
5 7 
9 5 
8 8

31. AIM: Program to find transpose of a Matrix.

Code:

#include<stdio.h> 
#include<conio.h>

int main()
{
    int a[3][2], b[2][3], i, j;

    printf("Enter value for matrix: "); 

    for(i=0;i<3;i++)
    {
        for(j=0;j<2;j++) 
            scanf(‘%d",&a[i][j]);
    }
    
    printf("Matrix:\n");
    for(i=0;i<3;i++) 
    {
        for(j=0;j<2;j++) 
        {
            printf(" %d ",a[i][j]);
        }
        printf("\n");
    } 
    
    for(i=0;i<3;i++) 
    { 
        for(j=0;j<2;j++) 
            b[j][i]=a[i][j];
    }
    
    printf("Transpose matrix:\n");
    
    for(i=0;i<2;i++) 
    { 
        for(j=0;j<3;j++)
            printf(" %d ",b[i][j]);
        printf("\n"); 
    }
    return 0;
}

Output:

Enter value for matrix: 
4
5 
6
1
2
3

Matrix:
4 5 
6 1 
2 3

Transpose matrix:
4 6 2 
5 1 3

32. AIM: Program to find factorial of a number using Functions.

Code:

#include<stdio.h> 
#include<conio.h>
int main()
{
    int a,f;
    int fact(int);
    printf("enter a no: "); 
    scanf("%d",&a); 
    f=fact(a); 
    printf("factorial= %d",f); 
    return 0;
}

int fact(int x)
{
    int fac=1,i; for(i=x;i>=1;i--)
    {
        fac=fac*i;
    }
    return fac; 
}

Output:

enter a no: 5 
factorial=120

33. AIM: Program to find multiplication of a two Matrix.

Code:

#include<stdio.h>    
#include<stdlib.h>  
int main(){  
    int a[10][10],b[10][10],mul[10][10],r,c,i,j,k;    
    printf("enter the number of row=");    
    scanf("%d",&r);    
    printf("enter the number of column=");    
    scanf("%d",&c);    
    printf("enter the first matrix element=\n");    
    for(i=0;i<r;i++)    
    {    
        for(j=0;j<c;j++)    
        {    
            scanf("%d",&a[i][j]);    
        }    
    }    
    printf("enter the second matrix element=\n");    
    for(i=0;i<r;i++)    
    {    
        for(j=0;j<c;j++)    
        {    
            scanf("%d",&b[i][j]);    
        }    
    }    
        
    printf("multiply of the matrix=\n");    
    
    for(i=0;i<r;i++)    
    {    
        for(j=0;j<c;j++)    
        {    
            mul[i][j]=0;    
            for(k=0;k<c;k++)    
            {    
                mul[i][j]+=a[i][k]*b[k][j];    
            }    
        }    
    }

    for(i=0;i<r;i++)    
    {    
        for(j=0;j<c;j++)    
        {    
            printf("%d\t",mul[i][j]);    
        }    
        printf("\n");    
    }    
    return 0;  
}

Output:

enter the number of row=3
enter the number of column=3
enter the first matrix element=
1 1 1
2 2 2
3 3 3
enter the second matrix element=
1 1 1
2 2 2
3 3 3
multiply of the matrix=
6 6 6
12 12 12
18 18 18

34. AIM: Program to swap two numbers using Functions.

Code:

#include<stdio.h> 
#include<conio.h>
int main()
{
    void swap(int,int);
    int a,b,r;

    printf("enter value for a & b: "); scanf("%d%d", &a, &b);
    swap(a,b);

}

void swap(int a,int b) 
{
    int temp;
    temp=a; 
    a=b;
    b=temp;
    printf("after swapping the value for a & b is : %d %d",a,b);
}

Output:

entervaluefora&b:4 5
after swapping the value for a & b : 5 4

35. AIM: Program to find square of a number using Functions.

Code:

#include<stdio.h> 
#include<conio.h>

int main() {
    int square(int);
    int r,a;
    printf("enter any no: ");
    scanf("%d",&a);
    r=square(a);
    printf("square is : %d",r);
    return 0;
}

int square(int x)
{
    return x*x ;
}

Output:

enter any no: 5 
square is : 25

36. AIM: Program to show Call by Value.

Code:

#include<stdio.h> 
#include<conio.h>

int main()
{
    int a,b,swap();
    a=5;
    b=10;
    printf("value of a=%d & value of b=%d before swap ",a,b); 
    swap(a,b);
    printf("\nvalue of a =%d & b=%d after swap",a,b);
}
int swap(int x, int y) 
{
    int temp;
    temp=x; 
    x=y;
    y=temp; 
}

Output:

value of a=5 & value of b=10 before swap
value of a=5 & b=10 after swap

37. AIM: Program to show call by Reference.

Code:

#include<stdio.h> 
#include<conio.h>

int main()
{
    int a,b,*aa,*bb,swap();
    clrscr();
    a=5;
    b=10;
    aa=&a;
    bb=&b;
    printf("value of a= %d & value of b=%d before swap",a,b); 
    swap(aa,bb);
    printf("\nvalue of a=%d & b=%d after swap",a,b);
    return 0;
}
int swap(int *x, int *y)
{
int temp;
temp=*x; *x=*y;
*y=temp; }

Output:

value of a= 5 & value of b=10 before swap 
value of a=10 & b=5 after swap

38. AIM: Program to find factorial of a number using recursion.

Code:

#include<stdio.h> 
#include<conio.h>

int main() {
    int n;
    printf("enter number: "); 
    scanf("%d",&n);
    if(n<0)
        printf("invalid number"); 
    else 
        printf("%d!=%d",n,fact(n));
    return 0;
}

int fact(int x) {
    if(x==0)
        return 1;
    else 
        return (x*fact(x-1));
}

Output:

enter number: 5 
5!=120

39. AIM: Program to show input and output of a string.

Code:

#include<stdio.h> 
#include<conio.h>

int main() 
{
    char a[50];
    printf("enter any string: ");
    gets(a); 
    puts(a); 
    return 0; 
}

Output:

enter any string: hi everyone 
hi everyone

40. AIM: Program to find whether a string is palindrome or not.

Code:

#include<stdio.h> 
#include<conio.h>
int main()
{
    char s1[20],s2[20];
    printf("enter a string: "); 
    scanf("%s",s1); 
    strcpy(s2,s1);
    strrev(s2); 
    
    if(strcmp(s1,s2)==0) 
        printf("string is a palindrome");
    else
        printf("not a palindrome string");
    return 0; 
}

Output:

enter a string: abc
not a palindrome string

41. AIM: Program to print the roll number, name, age and marks of a student using structures.

Code:

#include<stdio.h> 
#include<conio.h> 

int main()
{
    struct student 
    {
        int roll_no; 
        char name[30]; 
        int age;
        int marks;
    };
    struct student p1 = {1,"Brown",14,78};
    printf("%d\n %s\n %d\n %d",p1.roll_no,p1.name,p1.age,p1.marks); 
    return 0;
}

Output:

1 
Brown 
14
78

42. AIM: Program to add two numbers using pointers.

Code:

#include<stdio.h> 
#include<conio.h>

int main()
{
    int *p1,*p2,sum;
    printf("enter two no’s: ");
    scanf("%d%d",&*p1,&*p2);
    sum=*p1+*p2;
    printf("sum=%d",sum);
    return 0;
}

Output:

enter two no’s: 10 20 
sum=30

43. AIM: Program to subtract two number using pointers.

Code:

#include<stdio.h> 
#include<conio.h>
int main()
{
    int *p1,*p2,c;
    printf("enter two no’s: ");
    scanf("%d%d",&*p1,&*p2);
    c=*p1-*p2;
    printf("sum=%d" ,c);
    return 0; 
}

Output:

enter two no’s: 20 10 
sum=10

Code:

#include<stdio.h> 
#include<conio.h> 

int main()
{
    int a[10], i, item, flag=0;

    printf("Enter the data in the array");
    for(i=0;i<10;i++) 
    {
        scanf("%d", &a[i]);
    }
    printf("Enter the element to be searched");
    scanf("%d", &item); 
    
    for(i=0 ; i<10 ; i++) 
    {
        if(item==a[i])
        {
            flag=1;
            break; 
        }
    }

    if(flag==0)
        printf("Element Not Found");
    else
        printf("Element Found at Position =%d" ,i);
    return 0;
}

Output:

Enter the data in the array1 2 3 5 7 12 43 45 12 12
Enter the element to be searched12             
Element Found at Position =5

45. AIM: Program to implement Linked List.

Code:

// Linked list implementation in C

#include <stdio.h>
#include <stdlib.h>

// Creating a node
struct node {
  int value;
  struct node *next;
};

// print the linked list value
void printLinkedlist(struct node *p) {
  while (p != NULL) {
    printf("%d ", p->value);
    p = p->next;
  }
}

int main() {
  // Initialize nodes
  struct node *head;
  struct node *one = NULL;
  struct node *two = NULL;
  struct node *three = NULL;

  // Allocate memory
  one = malloc(sizeof(struct node));
  two = malloc(sizeof(struct node));
  three = malloc(sizeof(struct node));

  // Assign value values
  one->value = 1;
  two->value = 2;
  three->value = 3;

  // Connect nodes
  one->next = two;
  two->next = three;
  three->next = NULL;

  // printing node-value
  head = one;
  printLinkedlist(head);
}

Output:

1 2 3