#include<stdio.h> int check_bit(unsigned int number,unsigned int bit); int main(void){ unsigned int number,bit; printf("input a number and a bit position:"); while(scanf("%u%u",&number,&bit)==2){ printf("bit %u of %u is %d\n",bit,number,check_bit(number,bit)); printf("input a number and a bit position:"); } printf("quit\n"); return 0; } int check_bit(unsigned int number,unsigned int bit){ return (number>>bit)&1; }
#include<stdio.h> int count_on(int n); int main(void){ int n; printf("input a number:"); while(scanf("%d",&n)==1){ printf("%d--bit on number:%d\n",n,count_on(n)); printf("input a number:"); } printf("quit\n"); } int count_on(int n){ int count=0; while(n){ count+=n%2; n=n>>1; } return count; }
#include<stdio.h> int bin_dec(char *p); char *pbin="11001001"; int main(void){ printf("bin:%s,dec:%d",pbin,bin_dec(pbin)); return 0; } int bin_dec(char *p){ int dec=0; while(*p!='\0'){ dec=(dec<<1)+ *p++ -'0'; } return dec; }