11.2.3

来源：互联网发布：手机如何关注淘宝达人编辑：程序博客网时间：2024/06/05 06:00

11.12

 std::vector<std::pair<std::string, int>> vec;   while (std::cin >> str >> i)        vec.push_back(std::pair<std::string, int>(str, i));

11.13

vec.push_back(std::pair<std::string, int>(str, i));vec.push_back(std::make_pair(str, i));vec.push_back({ str, i });  //我认为这个最易于编写和理解vec.emplace_back(str, i);

11.14

#include <iostream>#include <map>#include <string>#include <algorithm>#include <vector>using std::string;using std::vector;using std::map;using std::pair;using std::cin;using std::cout;using std::endl;using Families = map < string, vector<pair<string, string>>>;Families make_families(){    Families families;    string in1, in2, in3;    cout << "姓：" << endl;    cin >> in1;    cout << "孩子及生日:" << endl;    while (cin >> in2 >> in3) {        families[in1].push_back(pair<string, string>(in2, in3));    }    return families;}int main() {    auto mf = make_families();    for (const auto &a : mf) {        cout << a.first << ":\n";        for (const auto &pair : a.second) {            cout << pair.first << ":" << pair.second << endl;            }        }    return 0;}

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