题解 | #IP地址#
IP地址
https://www.nowcoder.com/practice/2359e23180194f99828f5cd9c764236a
#include <iostream> #include<string.h> #include<vector> using namespace std; bool CheckIp(string ip){ if(ip.length()>15||ip.length()<7) return false; int temp=-1; int count=0; for(int i=0;i<ip.length();i++){ if(ip[i]!='.'&&(ip[i]>'9'||ip[i]<'0')) return false; if(ip[i]!='.'){ if(temp==-1) temp=0; temp=temp*10+int(ip[i]-'0'); } else{ if(temp<0||temp>255) return false; temp=-1; count++; } } if((temp<0||temp>255)||count!=3) return false; return true; } int main() { vector<string> ips; string input; while(getline(cin,input)) { ips.push_back(input); } for(int i=0;i<ips.size();i++) { if(CheckIp(ips[i])) cout<<"Yes!"<<endl; else cout<<"No!"<<endl; } return 0; } // 64 位输出请用 printf("%lld")