binary1.c

自己做的常用库和实现的数据结构。public domain.

/* binary1.c - - using bit operations to display binary */

#include <stdio.h>

char * itobs(int,char *);

int main(void)
{
   char bin_str[8*sizeof(int)+1];
   int number;
   while(scanf("%d",&number)==1)
     printf("%d is %s\n",number,itobs(number,bin_str));
   return 0;
}

char * itobs(int n,char * ps)
{
    int i;
    static int size=8*sizeof(int);
    for (i=size-1;i>=0;i--,n>>=1)
      ps[i]=(01&n)+'0';
    ps[size]='\0';
    return ps;
}