#include <stdio.h>#include <stdlib.h>#include <string.h>void binary_num(int, int);int main( int argc, char* argv[] ) {        int a = 30;    binary_num(a, sizeof(a) * 8);    printf("\n");    system("pause");    return 0;}void binary_num(int a, int i){    if (i > 1)            binary_num(a >> 1, --i );        if (a & 1)        printf("1");    else        printf("0");}