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Friday, June 10, 2011

SWAP TWO VARIABLES WITHOUT USING THIRD USING C PROGRAM VARIABLE

#include<stdio.h>
int main(){
    int a,b;
    printf("\nEnter two numbers:");
    scanf("%d %d",&a,&b);
    printf("\nBefore swapping a=%d b=%d",a,b);
    a=a^b;
    b=b^a;
    a=a^b;
    printf("\nAfter swapping a=%d b=%d",a,b);
    return 0;
}

OR
Swapping of two number
#include<stdio.h>
int main(){
    int a=5,b=10;
//process one
    a=b+a;
    b=a-b;
    a=a-b;
    printf("a= %d  b=  %d",a,b);

//process two
    a=5;
    b=10;
    a=a+b-(b=a);
    printf("\na= %d  b=  %d",a,b);
//process three
    a=5;
    b=10;
    a=a^b;
    b=a^b;
    a=b^a;
    printf("\na= %d  b=  %d",a,b);
   
//process four
    a=5;
    b=10;
    a=b-~a-1;
    b=a+~b+1;
    a=a+~b+1;
    printf("\na= %d  b=  %d",a,b);
   
//process five
    a=5,
    b=10;
    a=b+a,b=a-b,a=a-b;
    printf("\na= %d  b=  %d",a,b);
    getch();

}

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