C++里怎样用map将枚举类转换到string类

Posted 2023-03-14

#include<stdio.h>
#include<stdlib.h>
#include <string>
#include <map>
#include <iostream>
using namespace std;
int main (void)

enum NameAMY,JOHN,JOY;
map<Name, string> nameMap;
nameMap[AMY] = "AMY";
nameMap[JOHN] = "JOHN";
nameMap[JOY] = "JOY";Name salesname=JOHN;
string nameStr = nameMap[salesname];
cout<<nameStr<<endl;这里的error怎样解决？

参考技术A 将map<Name, string> nameMap;改成map<int, string> nameMap; 改后为：#include<stdio.h>
#include<stdlib.h>
#include <string>
#include <map>
#include <iostream>
using namespace std;
int main ()

enum NameAMY,JOHN,JOY;
map<int, string> nameMap;
nameMap[AMY] = "AMY";
nameMap[JOHN] = "JOHN";
nameMap[JOY] = "JOY"; Name salesname=JOHN;
string nameStr = nameMap[salesname];
cout<<nameStr<<endl;
return 0; 参考技术B #include<stdio.h>
#include<stdlib.h>
#include <string>
#include <map>
#include <iostream>
using namespace std;typedef enum
AMY,
JOHN,
JOY
Name;int main (void)
map<Name, string> nameMap;
nameMap[AMY] = "AMY";
nameMap[JOHN] = "JOHN";
nameMap[JOY] = "JOY";Name salesname=JOHN;
string nameStr = nameMap[salesname];
cout<<nameStr<<endl; 会出现很多警告，不要管他，直接运行就可以了，我用得是vc++6.0 参考技术C 反过来，把字符串转成enum值可以这样：
enum Graph cicle=1 , rectangle, squaregraph;
string cgraph;
map<string, Graph> namegraph;
namegraph["cicle"] = cicle;
namegraph["rectangle"] = rectangle;
namegraph["square"] = square;
cout << "please input the type of graph:(cicle/rectangle/square)";
cin >> cgraph;
switch (namegraph[cgraph])
case 1: ····· 参考技术D 这里没有看到error