程序代码：

#include<stdio.h>
void showInBit(unsigned int a)
{
    if(!a) return;
    showInBit(a >> 1);
    putchar((a & 1) + '0');
}
int main()
{
    int a;
    scanf("%d", &a);
    if(!a)  printf("00000000000000000000000000000000\n");
    else showInBit(a);
    return 0;
}