Swapping the numbers in C

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#include<stdio.h>
 void main( )
{ 
    int c,d;
    scanf("%d %d", &c, &d);
    printf("Value after swap c = %d and d = %d", d, c);
}

What I have tried:

Is the upper code is right or wrong?

Posted 7-Mar-22 5:16am

gufran J

Updated 7-Mar-22 5:43am

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Greg Utas · Accepted Answer · 2022-03-07T05:21:00

Solution 1

It looks good for display purposes, but the intention is probably to swap c and d for real:

C

int temp = c;
c = d;
d = temp;

Posted 7-Mar-22 5:21am

Greg Utas

Comments

Maciej Los 7-Mar-22 14:44pm

5ed!

OriginalGriff · Accepted Answer · 2022-03-07T05:43:00

Solution 2

Or for extra snazzy points:

C

void main( )
    { 
    int c,d;
    scanf("%d %d", &c, &d);
    c ^= d;
    d ^= c;
    c ^= d;
    printf("Value after swap c = %d and d = %d\n", c, d);
    }

Now work out how it does that ...

Posted 7-Mar-22 5:43am

OriginalGriff

Comments

Greg Utas 7-Mar-22 12:16pm

LOL

Maciej Los 7-Mar-22 14:44pm

5ed!