[user02@FC4 Lesson08]$ cat -n showgrad.cpp

   1  #include <iostream>
   2  using namespace std;
   3
   4  int main()
   5  {
   6     int test_score;
   7
   8     cout << "Type in your test score and press Enter: ";
   9     cin >> test_score;
  10
  11     if (test_score >= 90)
  12        cout << "You got an A!" << endl;
  13     else if (test_score >= 80)
  14        cout << "You got a B!" << endl;
  15     else if (test_score >= 70)
  16        cout << "You got a C" << endl;
  17     else if (test_score >= 60)
  18        cout << "Your grade was a D" << endl;
  19     else
  20        cout << "You failed the test" << endl;
  21
  22     return 0;
  23  }

[user02@FC4 Lesson08]$ g++ -o showgrad showgrad.cpp
[user02@FC4 Lesson08]$ ./showgrad
Type in your test score and press Enter: 97
You got an A!
[user02@FC4 Lesson08]$ ./showgrad
Type in your test score and press Enter: 82
You got a B!
[user02@FC4 Lesson08]$ ./showgrad
Type in your test score and press Enter: 78
You got a C
[user02@FC4 Lesson08]$ ./showgrad
Type in your test score and press Enter: 64
Your grade was a D
[user02@FC4 Lesson08]$ ./showgrad
Type in your test score and press Enter: 56
You failed the test