C++ pair,map,vector简单用法

#include <iostream>#include <vector>#include <map>using namespace std;int main(){pair<int,double>  p1;p1 = std::make_pair(1,2.5);cout<<p1.first<<endl<<p1.second<<endl;pair<int,float> p2(2,4.56);cout<<p2.first<<endl<<p2.second<<endl;vector<int> v1 ;v1.push_back(1);v1.push_back(2);v1.push_back(3);v1.push_back(4);        v1.pop_back();//删除最后一个元素，返回voidint begin= v1.front();//返回第一个元素的值，不删除cout<<begin<<endl;map<int,char> m1 ;m1[0] = 'a';m1[1] = 'b';m1[2] = 'c';cout<<m1[2]<<endl;return 0;}//1//2.5//2//4.56//1//c//请按任意键继续. . .

参考：

http://blog.csdn.net/u012787116/article/details/52064168

http://blog.csdn.net/hancunai0017/article/details/7032383