Sep 30, 2011

C Program To Swap Two Variables

C Program To Swap Two Variables without using the third variable. This type of C programs are asked in various Interviews.There are various methods to achieve this one. For example, a=a+b;
b=a-b;
a=a-b;
Here we use the XOR(^) operator to Swap Two Variables without using the third variable. Read more about C Programming Language .

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#include<stdio.h>

int main()
{
 int a=20;
 int b=10;
 printf("Values of a and b before swapping\n");
 printf("a=%d\nb=%d\n",a,b);
 a=a^b;
 b=b^a;
 a=b^a;
 printf("Values of a and b After swapping\n");
 printf("a=%d\nb=%d\n",a,b);
 return 0;
}
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