uri1026.c

#include <stdio.h>

void decToBin(unsigned int x, char * vect);
unsigned int binToDec(unsigned int r, char * vect);
unsigned int powerof(unsigned int n, int xp);

int main(void){

	unsigned int x, y, i, r;
	char binx[33] = {'\0'}, biny[33] = {'\0'}, binr[33] = {'\0'};

		while(scanf("%d", &x) != EOF){

		if(scanf("%d", &y) == EOF)
			return 0; 

		decToBin(x, binx);
		decToBin(y, biny);

		for(i=0; i<32; i++){

			if(binx[i] == biny[i] && binx[i] == '1')
				binr[i] = '0';
			else if(binx[i] != biny[i])
				binr[i] = '1';
			else
				binr[i] = '0';
		}

		r = binToDec(r, binr);

		printf("%u = %s\n%u = %s\n%u = %s\n", x, binx, y, biny, r, binr);
		//printf("%u\n", r);
		
	}
	return 0;
}

void decToBin(unsigned int x, char *vect){

	int i;

	for(i=31; i>=0; i--){

		vect[i] = 48 + (x % 2);
		x/=2;
	}
}

unsigned int binToDec(unsigned int r, char *vect){

	int i;
	r=0;
	for(i=31; i>=0; i--)
		if(vect[i] == '1')
			r += powerof(2, (31-i));

	return r;
}

unsigned int powerof(unsigned int n, int xp){

	if(xp==0)
		return 1;
	else
		return n*powerof(n, xp-1);
}