我又努力了一下，把zeng9999jian的百家姓从一百多行给压缩到二十几行，我真棒！

#include<bits/stdc++.h>
using namespace std;
string a[100]={
    "zeng","jiang","zhou","yan","yao",
    "xu","huang","meng","pan","fang",
    "zhao","qian","li","wu","zheng",
    "wang","feng","chen","chu","wei",
    "su","shen","han","yang","zhu","qin",
    "you","he","lu","shi","zhang","kong",
    "cao","hua","jin","tao","xie","zou",
    "yu","bai","shui","dou","yun"
};
int main(){
    string b;
    cout<<"请输入姓氏的拼音，如zhou（周），如果有这个姓氏，则输出true，反之则输出false\n";
    cout<<"因为这个只有46个姓氏，所以可能不准\n退出请输入“退出”\n";
    while(cin>>b){
        if(b=="退出")return 0;
        for(int i=0;i<43;i++){
            if(a[i]==b)
                cout<<"true"<<endl;
            if(i==43)
                cout<<"false"<<endl;
        }
    }
}