第一种:用insert函数插入pair数据
#include <map> #include <string> #include <iostream> using namespace std; int main(){ map<int,string> mapStudent; mapStudent.insert(pair<int, string>(1,"student_one")); mapStudent.insert(pair<int, string>(2,"student_two")); mapStudent.insert(pair<int, string>(3,"student_three")); map<int, string>::iterator iter; for(iter=mapStudent.begin();iter!= mapStudent.end();iter++){ cout<<iter->first<<" "<<iter->second<<endl; } return 0; }
第二种:用insert函数插入value_type数据
#include <map> #include <string> #include <iostream> using namespace std; int main(){ map<int,string> mapStudent; mapStudent.insert(map<int, string>::value_type (1,"student_one")); mapStudent.insert(map<int, string>::value_type (2,"student_two")); mapStudent.insert(map<int, string>::value_type (3,"student_three")); map<int, string>::iterator iter; for(iter=mapStudent.begin();iter!= mapStudent.end();iter++){ cout<<iter->first<<" "<<iter->second<<endl; } return 0; }
第三种:用数组方式插入数据
#include <map> #include <string> #include <iostream> using namespace std; int main(){ map<int,string> mapStudent; mapStudent[1]="student_one"; mapStudent[2]="student_two"; mapStudent[3]="student_three"; map<int, string>::iterator iter; for(iter=mapStudent.begin();iter!= mapStudent.end();iter++){ cout<<iter->first<<" "<<iter->second<<endl; } return 0; }
真正有用的是下面的根据关键字查找(字符串类型)其他信息
#include <map> #include <string> #include <iostream> using namespace std; int main(){ map<string,string>mapStudent; /* mapStudent.insert(map<string, string>::value_type ("zhangsan","student_one")); mapStudent.insert(map<string, string>::value_type ("lisi","student_two")); mapStudent.insert(map<string, string>::value_type ("wangwu","student_three")); */ mapStudent["zhangsan"]="bad boy"; mapStudent["lisi"]="good boy"; mapStudent["wangwu"]="good girl"; map<string,string>::iterator iter; iter=mapStudent.find("lisi"); if(iter!=mapStudent.end()) cout<<iter->first<<":"<<iter->second<<endl; iter=mapStudent.find("tianqi"); if(iter==mapStudent.end()) cout<<"There is no such a man"<<endl; return 0; }