Answer / it diploma student

let a and b be the variables

a=a+b
b=a-b
a=a-b

if we take a=5 and b = 7 then

a = 5+7 = 12
b = 12-7 = 5
a = 12-5 = 7

hence swaped...

Answer / guest

[code]

main()
{
int a=10;
int b=20;
printf("a = %d\nb = %d\n",a,b);
a =a+b; b=a-b; a=a-b; // This is first way.

a =a*b; b=a/b; a=a/b;
printf("a = %d\nb = %d\n",a,b);
}
[/code]

[code]
main()
{
int a=10;
int b=20;
printf("a = %d\nb = %d\n",a,b);
a =a*b; b=a/b; a=a/b; //This is second way
printf("a = %d\nb = %d\n",a,b);
}
[/code]

Answer / sam

let a and b be variables
a^=b^=a^=b;
by performing this logic from right hand side we can swap
two variables

1 1 1 1 2 1 1 3 3 1 1 4 6 4 1

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