题目意思很简单，就是根据身份证号码来确定一个人的籍贯和生日，（然而我开始脑子抽了还以为还要根据奇数偶数判断男女233333）。
然后我的暴力ac代码：
1 #include <iostream> 2 #include<math.h> 3 #include <iomanip> 4 #include<cstdio> 5 #include<string> 6 #include<map> 7 #include<vector> 8 #include<algorithm> 9 #include<stdlib.h> 10 using namespace std; 11 12 13 14 int main() 15 { 16 int n; 17 string id; 18 cin>>n; 19 20 while(n--){ 21 cin>>id; 22 if(id[0]=='3'&&id[1]=='3'){ 23 cout<<"He/She is from Zhejiang,and his/her birthday is on "<<id[10]<<id[11]<<","<<id[12]<<id[13]<<","<<id[6]<<id[7]<<id[8]<<id[9]<<" based on the table."<<endl; 24 } 25 26 else if(id[0]=='1'&&id[1]=='1'){ 27 cout<<"He/She is from Beijing,and his/her birthday is on "<<id[10]<<id[11]<<","<<id[12]<<id[13]<<","<<id[6]<<id[7]<<id[8]<<id[9]<<" based on the table."<<endl; 28 } 29 30 else if(id[0]=='7'&&id[1]=='1'){ 31 cout<<"He/She is from Taiwan,and his/her birthday is on "<<id[10]<<id[11]<<","<<id[12]<<id[13]<<","<<id[6]<<id[7]<<id[8]<<id[9]<<" based on the table."<<endl; 32 } 33 34 else if(id[0]=='8'&&id[1]=='1'){ 35 cout<<"He/She is from Hong Kong,and his/her birthday is on "<<id[10]<<id[11]<<","<<id[12]<<id[13]<<","<<id[6]<<id[7]<<id[8]<<id[9]<<" based on the table."<<endl; 36 } 37 38 else if(id[0]=='8'&&id[1]=='2'){ 39 cout<<"He/She is from Macao,and his/her birthday is on "<<id[10]<<id[11]<<","<<id[12]<<id[13]<<","<<id[6]<<id[7]<<id[8]<<id[9]<<" based on the table."<<endl; 40 } 41 42 else if(id[0]=='5'&&id[1]=='4'){ 43 cout<<"He/She is from Tibet,and his/her birthday is on "<<id[10]<<id[11]<<","<<id[12]<<id[13]<<","<<id[6]<<id[7]<<id[8]<<id[9]<<" based on the table."<<endl; 44 } 45 46 else if(id[0]=='2'&&id[1]=='1'){ 47 cout<<"He/She is from Liaoning,and his/her birthday is on "<<id[10]<<id[11]<<","<<id[12]<<id[13]<<","<<id[6]<<id[7]<<id[8]<<id[9]<<" based on the table."<<endl; 48 } 49 50 else { 51 cout<<"He/She is from Shanghai,and his/her birthday is on "<<id[10]<<id[11]<<","<<id[12]<<id[13]<<","<<id[6]<<id[7]<<id[8]<<id[9]<<" based on the table."<<endl; 52 } 53 54 } 55 return 0; 56 }
想表示下，我开始并没有顺利ac因为，我最后一行的输出多了一个空格，233333.
然后就去看了下别人的代码，于是想补充下字符串的一些知识：
一个截取字符串的函数substr()，觉得比较方便，该函数的用法见下面一个示例代码，一看便知：
#include<string> #include<iostream> using namespace std; main() { string s("12345asdf"); string a=s.substr(0,4); //获得字符串s中 从第0位开始的长度为4的字符串 cout<<a<<endl; }
ac代码：
#include <iostream> #include<string> using namespace std; int main(void) { int n; string input_str,place; cin>>n; for(int i=0; i<n; i++) { cin>>input_str; if(input_str.substr(0,2)=="33") place="Zhejiang"; else if(input_str.substr(0,2)=="11") place="Beijing"; else if(input_str.substr(0,2)=="71") place="Taiwan"; else if(input_str.substr(0,2)=="81") place="Hong Kong"; else if(input_str.substr(0,2)=="82") place="Macao"; else if(input_str.substr(0,2)=="54") place="Tibet"; else if(input_str.substr(0,2)=="21") place="Liaoning"; else if(input_str.substr(0,2)=="31") place="Shanghai"; cout <<"He/She is from"<<" "<< place << ",and his/her birthday is on"<<" "<<input_str.substr(10,2)<<"," <<input_str.substr(12,2)<<","<<input_str.substr(6,4)<<" " <<"based on the table."<<endl; } return 0; }
补充部分来自：http://blog.csdn.net/always2015/article/details/45391791