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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7.     int rows = 2, columns = 3 ;
  8.     double scores[rows][columns] ;
  9.     for (int i = 0 ; i < rows ; i++){
  10.         cout << "Enter the grades of student " << i + 1 << '\n';
  11.         for (int j = 0; j < columns; j++){
  12.             do{
  13.                 cout << "Subject " << j+1 << ": "<< '\n' ;
  14.                 cin >> scores[i][j] ;
  15.              } while(scores[i][j]< 0 || scores[i][j] > 100);
  16.         }
  17.         cout << "=============================\n";
  18.     }
  19.     for (int i = 0 ; i < rows ; i++){
  20.         double sm = 0 ;
  21.         for (int j = 0; j < columns; j++){
  22.             sm += scores[i][j] ;
  23.         }
  24.         double perc = sm / 300 * 100 ;
  25.        cout << "The Score of student " << i + 1 << ':';
  26.        cout << perc << "%\t" ;
  27.        if (perc >= 85) cout << "Excellent";
  28.        else if (perc >= 75) cout << "V.Good";
  29.        else if (perc >= 65) cout << "Good";
  30.        else if (perc >= 50) cout << "Fair";
  31.        else cout << "Poor";
  32.        cout << '\n';
  33.     }
  34.     return 0;
  35. }
Success #stdin #stdout 0.01s 5280KB
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stdin
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Standard input is empty
stdout
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Enter the grades of student 1
Subject 1: 
Subject 2: 
Subject 3: 
=============================
Enter the grades of student 2
Subject 1: 
Subject 2: 
Subject 3: 
=============================
The Score of student 1:2.31766e-310%	Poor
The Score of student 2:3.71037e-311%	Poor
https://ideone.com/e6wHAZ
Scores of students
language:
C++14 (clang 8.0)
created:
16 days ago
visibility:
public

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