C Program to Read Two Integers M and N & Swap ir Values:

This is a C program to read two integers & swap their values.

Problem Description

This program reads two integers & swaps their values.

Problem Solution

•  Take two integers as input.

• Use a function for swapping process.

• Exchange the values using another variable.

• Print the output and exit.

Program/Source Code

/*
 * C program to read two integers M and N and to swap their values.
 * Use a user-defined function for swapping. Output the values of M
 * and N before and after swapping.
 */
#include <stdio.h>
void swap(float *ptr1, float  *ptr2);
 
....

This is a C program to read two integers & swap their values.

Problem Description

This program reads two integers & swaps their values.

Problem Solution

•  Take two integers as input.

• Use a function for swapping process.

• Exchange the values using another variable.

• Print the output and exit.

Program/Source Code

/*
 * C program to read two integers M and N and to swap their values.
 * Use a user-defined function for swapping. Output the values of M
 * and N before and after swapping.
 */
#include 
void swap(float *ptr1, float  *ptr2);
 
void main()
{
    float m, n;
 
    printf("Enter the values of M and N \n");
    scanf("%f %f", &m, &n);
    printf("Before Swapping:M = %5.2ftN = %5.2f\n", m, n);
    swap(&m, &n);
    printf("After Swapping:M  = %5.2ftN = %5.2f\n", m, n);
}
/*  Function swap - to interchanges the contents of two items */
void swap(float *ptr1, float *ptr2)
{
    float temp;
 
    temp = *ptr1;
    *ptr1 = *ptr2;
    *ptr2 = temp;
}

Program Explanation

1. Take the two integers as input and store it in the variables m and n respectively.

2.  Call function swap. Pass addresses of variables to the function swap.

3. Receive the addresses by the two pointers ptr1 and ptr2.

4. First copy the value stored at &m to the variable temp.

5. Copy the value stored at &n to &m.

6. Copy the value in the variable temp to &n.

7. Print the variables m and n as output and exit

Output:

Enter the values of M and N

2 3

Before Swapping:M =  2.00 N = 3.00

After Swapping:M  = 3.00 N = 2.00