C Program to Swap two Numbers

Published on December 11, 2016 by abundantcode

Filed under C

Last modified December 11, 2016

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Problem

Write a program in C language to swap two numbers using a temporary variable and display the result in the screen.

How to Swap two numbers in C using a temporary variable?

#include <stdio.h>
int main()
{
      double input1, input2, temp;
      printf("Abundantcode - Swap two numbers using temporary variable\n");
      // First number
      printf("Enter First Number: ");
      scanf("%lf", &input1);
      // 2nd Number
      printf("Enter Second Number: ");
      scanf("%lf",&input2);
      // Usage of the temporary variable to swap the numbers
      temp = input1;
      input1 = input2;
      input2 = temp;

      printf("\nFirstNumber = %.2lf\n", input1);
      printf("SecondNumber = %.2lf", input2);

      return 0;
}

Output

Abundantcode – Swap two numbers using temporary variable  
Enter First Number: 1                               
Enter Second Number: 7                                 
FirstNumber = 7.00                                  
SecondNumber = 1.00

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