C Code 13 _ To swap two numbers using third variable and with out using third variable

C Code 13 _ To swap two numbers using third variable and with out using third variable

Program:

#include<stdio.h>

int main()

{

                int a,b,temp,ch;

                printf("* * * * * * Swapping Two Numbers * * * * * * *");

                printf("\nCommonly there are two ways of swapping numbers : ");

                printf("\n1 - Swapping using Third variable ");

                printf("\n2 - Swapping with out using Third variable ");

                printf("\nEnter two integers : ");

                scanf("%d%d",&a,&b);

                printf("\nEnter your choice (1 or 2) , \n1 for trying swapping using third variable\n2 for with out using third variable : ");

                scanf("%d",&ch);

                switch(ch)

                {

                                case 1:

                                                //here we are using a temporary variable(temp) to swap two numbers.

                                                printf("\nValues before swapping : a = %d  b = %d ",a,b);

                                                temp=a;

                                                a=b;

                                                b=temp;

                                                printf("\nValues after swapping : a = %d  b = %d ",a,b);

                                                break;

                                               

                                case 2:

                                                //here we are using arithmetic operation to swap two numbers. 

                                                printf("\nValues before swapping : a = %d  b = %d ",a,b);

                                                a=a+b;

                                                b=a-b;

                                                a=a-b;

                                                printf("\nValues after swapping : a = %d  b = %d ",a,b);

                                                break;

                                               

                                default:

                                                printf("\nEnter either 1 or 2");

                }

                return 0;

}

Output:

Thank you ...