C++ Map 操作

Last Update: 2013/05/24 17:43+08
Type: Note

Content

前置

#include "stdafx.h"
#include <string>
#include <map>
using namespace std;

宣告

int _tmain(int argc, _TCHAR* argv[])
{
 map<string, int> maps;

Insert

 map<string,int>::iterator it = maps.begin();
 maps.insert(it, pair<string,int>("A",26));
 maps.insert(it, pair<string,int>("B",27));
 maps.insert(it, pair<string,int>("C",28));
 maps.insert(it, pair<string,int>("D",29));
 maps["E"] = 30;

For Loop

 for (it=maps.begin(); it != maps.end(); ++it){
  printf("%s = %i\n", it->first.c_str(), it->second);
 }

Get

 printf("E = %i\n", maps["E"]);
 printf("F = %i\n", maps["F"]);//預設為0

Remove

 maps.erase("E");

Find

 it = maps.find("E");
 if(it == maps.end())
  printf("not found.\n");
 else
  printf("%s = %i\n", it->first.c_str(), it->second);

The end...

    
 getchar();
 return 0;
}