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C Program to swap values using third variable

C Program to swap values using third variable

In this tutorial, you will learn how to write a program to swap values using a third variable and a for-loop.

Our problem statement

Here we are taking two variables a and b and swapping their values with the help of a third variable.

For Example:

Input: a=45 and b=56

Output: a=56 and b=45

In the below program, the third variable ‘c’ acts as a temporary placeholder. When iterating using for-loop values for the variables are temporarily kept in ‘c’ variable. 

#include <stdio.h>

int main() {
    int a, b, temp;
    printf("Enter the values of a and b: ");
    scanf("%d %d", &a, &b);

    printf("Before swapping: a = %d, b = %d\n", a, b);

    temp = a;
    for (int i = 0; i < 1; i++) {
        a = b;
        b = temp;
    }

    printf("After swapping: a = %d, b = %d", a, b);
    return 0;
}

Output:

Enter the values of a and b: 45
56
Before swapping: a = 45, b = 56
After swapping: a = 56, b = 45
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