将十进制ip转换为二进制显示。如输入128.1.2.128，转换为10000000.00000001.00000010.10000000
#include <stdio.h>#include <string.h>//将IP地址转化为二进制void bin(int s){ int c[8]={0}; int i=7,tmp,j; while(s!=0){ tmp = s%2; c[i] = tmp; s = s/2; i--; } for(j=0;j<8;j++){ printf("%d",c[j]); }}int main(){ int l,n=0,i,j; char c[30]; int s[3]; while(scanf("%s",c)!=EOF){ l = strlen(c); for(i=0;i<l;i++){ if(c[i]>='0'&&c[i]<='9'){ j = c[i] - '0'; n = n*10+j; }else{ bin(n); printf("."); n=0; } if(i==l-1){ bin(n); } } } return 0;}