Accelerated C++ exercise

3-5.cpp

/*
3-5. Write a program that will keep track of grades for several students at
once. The program could keep two vectors in sync: The first should hold the
student's names, and the second the final grades that can be computed as input
is read. For now, you should assume a fixed number of homework grades. We'll see
in §4.1.3/56 how to handle a variable number of grades intermixed with student
names.
-------------------------
Again, I think we can just use a map - can we use a mapping of strings to
vectors?
*/

#include <iostream>
#include <map>
#include <vector>

using std::cin;
using std::cout;
using std::endl;
using std::map;
using std::string;
using std::vector;

int main() {
  map<string, vector<int>> grades;
  cout << "Enter a student name (or CTRL-D to stop): ";
  string name;
  while (cin >> name) {
    int grade;
    cout << "Enter a list of grades (or CTRL-D to stop): ";
    while (cin >> grade) {
      grades[name].push_back(grade);
    }
    cin.clear();
    cout << "Enter another student name (or CTRL-D to stop): ";
  }
  cout << endl;

  for (auto student_grade_pair : grades) {
    cout << "Student: " << student_grade_pair.first << endl;
    cout << "Grades: ";
    for (auto grade : student_grade_pair.second) {
      cout << grade << " ";
    }
    cout << endl;
  }
}