C语言打印二进制的代码

#include"stdio.h"
#define N 32
#define M 1<<(N-1)
void print(unsigned c)   
{      
int i;   
for (i=0;i<N ;i++)   
{      
   if(i%8==0)printf(" "); 
   putchar(((c&M)==0)?'0':'1');
   c<<=1;   
}      
printf("/n");   
}
int main()
{
unsigned d;
start:scanf("%u",&d);
printf("%u的二进制为:",d);
print(d);
goto start;
return 0;
}

_____________________________________________
#include <stdio.h>
void print(unsigned int c)
{
if (c>>1) print(c>>1);
printf("%d", c&1);
}

int main()
{
unsigned int d;
while (1)
{
scanf("%u",&d);
printf("%u的二进制为:",d);
print(d);
printf("/n");
}
return 0;
}
文章出处：DIY部落(http://www.diybl.com/course/3_program/c++/cppsl/2008619/126868.html)