map的三种插入操作
Xredman
posted @ Jun 13, 2009 05:46:00 AM
in 以前博文
, 1175 阅读
#include <iostream>
#include <algorithm>
#include <string>
#include <map>
using namespace std;
int main()
{
map<string, int> M;
M.clear();
/*用下标初始化*/
M[string("i1")] = 1;
/*用pair初始化*/
M.insert(pair<string, int>(string("i2"), 2));
/*直接用内置的value_type初始化*/
M.insert(map<string, int>::value_type ("i3", 3));
map<string, int>::iterator p = M.begin();
while(p != M.end())
{
cout<<"first: "<<p->first<<" secnd: "<<p->second<<endl;
p++;
}
return 0;
}
#include <algorithm>
#include <string>
#include <map>
using namespace std;
int main()
{
map<string, int> M;
M.clear();
/*用下标初始化*/
M[string("i1")] = 1;
/*用pair初始化*/
M.insert(pair<string, int>(string("i2"), 2));
/*直接用内置的value_type初始化*/
M.insert(map<string, int>::value_type ("i3", 3));
map<string, int>::iterator p = M.begin();
while(p != M.end())
{
cout<<"first: "<<p->first<<" secnd: "<<p->second<<endl;
p++;
}
return 0;
}
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