#include <cstdlib>
#include <iostream>
#include<string>
using namespace std;

int counter=0;

int studentGrade;
int acounter =0;
int bcounter = 0;
int ccounter = 0;
int dcounter = 0;
int fcounter = 0;



int main ()
{
        
  cout<<"\n please enter a grade ";
  cin >>studentGrade;
  
for ( int i=51;i<=99; i ++ )
{
int random_integer = (rand() % 50) + 51;


  
    if ( studentGrade >89 && studentGrade <= 100 )
   {
   cout << "A";
counter =  acounter;
acounter++;
}
else
   if (studentGrade >79 && studentGrade < 90 )
     {
      cout << "B";
  counter = bcounter;
bcounter++;
}
   else
      if (studentGrade >69 && studentGrade<80)
       {
         cout << "C";  
      counter=ccounter;
      ccounter++;
      }
      else
         if ( studentGrade >59 && studentGrade<70 )
            {
            cout << "D";
            counter=dcounter;
            dcounter++;
            }
            else
            if ( studentGrade >49 && studentGrade<60 )
            cout << " F";
            counter=fcounter;
   fcounter++;

cin>>studentGrade;

cin>>counter;

}
return 0;
}

#include <iostream>

using namespace std;

int acounter = 0;

int main() {
    for (int i=0; i<60; i++) {  //loop runs through 60 rounds
        int random_integer = (rand() % 50) + 51;//assigns a random number 51-100

        if (random_integer >89 && random_integer <= 100) {//test if random grade is in the range for an 'A'
            cout << random_integer << " ";
            cout << "A" << endl;
            acounter++;//increment acounter if grade is an 'A'
        }
    }
    cout << acounter << endl;
    return 0;
}

#include <iostream>
#include <cstdlib>
#include<string>

using namespace std;

int acounter = 0;
int bcounter = 0;
int ccounter = 0;
int dcounter = 0;
int fcounter = 0;
int main() {
    for (int i=0; i<60; i++) {  //loop runs through 60 rounds
        int random_integer = (rand() % 50) + 51;//assigns a random number 51-100

        if (random_integer >89 && random_integer <= 100) {//test if random grade is in the range for an 'A'
            cout << random_integer << " ";
            cout << "A" << endl;
            acounter++;
            }
        else
        if (random_integer >79 && random_integer < 90) {//test if random grade is in the range for an 'B'
            cout << random_integer << " ";
            cout << "B" << endl;
            bcounter++;
            }
            
            else
            
            if (random_integer >69 && random_integer < 80) {//test if random grade is in the range for an 'C'
            cout << random_integer << " ";
            cout << "C" << endl;
            ccounter++;
            
            }
            else
            if (random_integer >59 && random_integer < 70) {//test if random grade is in the range for an 'D'
            cout << random_integer << " ";
            cout << "D" << endl;
            dcounter++;
            }
            else
            if (random_integer >49 && random_integer <60) {//test if random grade is in the range for an 'F'
            cout << random_integer << " ";
            cout << "F" << endl;
            fcounter++;
        
        }
            
      
    }
    
    cout << " number of grade A is :" << acounter << endl;
   cin>>acounter;
   cout << " number of grade B is :" << bcounter << endl;
   cin>>bcounter;
   cout << " number of grade C is :" << ccounter << endl;
    cin >>ccounter;
    cout << " number of grade D is :" << dcounter << endl;
    cin>>dcounter;
    cout << " number of grade F is :" << fcounter << endl;
    cin>>fcounter;
    
    
    
    return 0;
}

      cout << " number of grade A is :" << acounter << endl;
      cout << " number of grade B is :" << bcounter << endl;
      cout << " number of grade C is :" << ccounter << endl;
      cout << " number of grade D is :" << dcounter << endl;
      cout << " number of grade F is :" << fcounter << endl;
cin>>acounter;