Question 8 Student Histograms CS311

#include<iostream>
#include<vector>
#include<iomanip>
#include<algorithm>
using namespace std;
int main()
{
//The program should input each student's grade as an integer and store the grade in a vector.

int value = 0;
vector<int> grades;
cout <<"Enter grades separated by white spaces (ending with a negative number): ";
cin >> value;

// Grades should be entered until the user enters a negative number for a grade.

while(value!=-1)
{
grades.push_back(value);
cin >> value;
}
cout << endl;

//In computing the histogram, the minimum value of a grade is 0,
int max = 0;

//but your program should determine the maximum value entered by the user.
for(int i=0; i<grades[i]; i++){
    if(grades[i] > max) max = grades[i];
}

//Use a dynamic array to store the histogram.
int* array= new int[max+1];

//The program should then scan through the vector and compute the histogram.
for(int i=0; i< grades[i] ; i++)
{
array[grades[i]]++;
}
//Output the histogram to the console. Use top-down design

for(int i=0; i<=max; i++){
if(array[i]!=0)
cout <<"Number of " << i <<"'s:\t" << array[i] << endl;
}
return 0;
}