C ++程序在STL中实现配对
Pair是一个简单的容器，由两个数据对象组成：
‘first’ = The first element is referenced as ‘first’ ‘second’ = the second element and the order is fixed (first, second).
可以分配，比较和复制对。它用于将两个类型可能不同的值组合在一起。
语法为：pair<数据类型1，数据类型2>变量名称（数据值1，数据值2）。
算法
Begin Write pair<data type1,data type 2>variable name(datavalue1,datavalue2) Print the pairs End
范例程式码
#include<iostream>
using namespace std;
int main() {
pair <char,int> value('a',7);
pair <string,double> fruit ("grapes",2.30);
pair <string,double> food ("pulao",200);
cout<<"The value of "<<value.first<<" is "<<value.second <<endl;
cout<<"The price of "<<fruit.first<<" is Rs. "<<fruit.second <<endl;
cout<<"The price of "<<food.first<<" is Rs. "<<food.second <<endl;
return 0;
}输出结果
The value of a is 7 The price of grapes is Rs. 2.3 The price of pulao is Rs. 200
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