C program to swap two numbers using temporary variable(method 1)

Swapping is used in sorting algorithms like in bubble sort,that is when we wish to arrange numbers in a particular order either in ascending order or in descending order.

Problem:

Given two numbers num1=a and num2=b, task is exchange values of these numbers i.e num1=b and num2=a;

Method 1: Using third variable

#include<stdio.h>

int main(){

    int num1=10,num2=20;

    void swapUsingTemp(int,int);  //function prototype

   printf("Values before swapping by call by value: num1=%d,num2=%d.\n",num1,num2);

    swapUsingTemp (num1,num2);

    return 0;

}

//function definition: using third variable

void swapUsingTemp (int n1,int n2){

  int temp;

  temp=n1;

  n1=n2;

  n2=temp;

  printf("Inside swap1 : num1=%d,num2=%d\n",n1,n2);

}

Output:

Please comment if you find anything incorrect, or you want to improve the topic discussed above.