#include <stdio.h>

int main ()

{

unsigned int t = 0xffffffff;

unsigned int z = 1;

int a = 10, b = 10, sum = 0, r = 0;

while (t) {

int t1, t2;

t1 = a & 0x00000001;

t2 = b & 0x00000001;

if ((t1 ^ t2 ^ r) == 1) {

if (t1 == 1 && t2 == 1 && r == 1)

r = 1;

else

r = 0;

sum = sum | z;

} else {

if (t1 == 0 && t2 == 0 && r == 0)

r = 0;

else

r = 1;

}

a >>= 1;

b >>= 1;

z <<= 1;

t >>= 1;

}

printf ("sum: %dn", sum);

return 0;

}