Answer Posted / yadhunandan.t

wap to swap two numbers without using third variable.
#include<stdio.h>
#include<conio.h>
void main()
{
int a,b;
clrscr();
printf("enter the value of a & b");
scanf("%d %d",&a,&b);
printf("\n\n\n before swaping");
printf("\n\ta:%d",a);
printf("\n\tb:%d",b);
a=a+b;
b=a-b;
a=a-b;
printf("\n\n\n after swaping");
printf("\n\ta:%d",a);
printf("\n\tb:%d",b);
getch();
}

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