2015年C++第三周，任务二：输入几个学生的成绩，用空格隔开，利用容器vector输出成绩，并显示各个等级的数量。

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任务二：输入几个学生的成绩，用空格隔开，利用容器vector输出成绩，并显示各个等级的数量。

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#include "stdafx.h"#include <cstddef>#include <vector>#include <algorithm>#include <string>#include <ios>#include <iostream>using namespace std;int main(){// count the number of grades by clusters of ten:// 0--9, 10--19, . . . 90--99, 100vector<int> scores(11, 0);vector<int> grades;//store the gradesvector<string> L = { "J", "I", "H", "G", "F", "E", "D", "C", "B", "A", "A++" };    int grade;char ch;cout << "please input the grades of students(以！+回车结尾，各个输入数之间用空格隔开）:" << endl;while ((cin >> grade )&& ((ch = getchar()) != '\n')){if (grade <= 100)// increment the counter for the current cluster{grades.push_back(grade);++scores[grade / 10];}}vector<int>::iterator iter;for (iter = grades.begin(); iter != grades.end(); ++iter){cout << *iter << " ";}cout << endl;cout << grades.size() << endl; cout << "各个等级的个数（A++<100>,其余各10个数，如A<90-99>):" << endl;vector<string>::iterator it;for (it = L.begin(); it != L.end(); ++it){cout << *it << " ";}cout << endl;for (auto j : scores)cout << j<< " ";       // print the value of that countercout << endl;}

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