Do While Example

Do While Loop Practice Exercise

Video Summary: https://youtu.be/0LaAyvg5AP4

Copy and paste the following example into your IDE:

/************************************************************
 *
 *       FileName: loopDW.cpp
 *       Purpose:  Demonstrate how to use Do-while Statement.
 *
 **************************************************************/
#include <iostream>
using namespace std;

int main()
{
   int mark;
   char grade;

cout << "Please enter an integer mark: "  << endl;

// Please add a do-while loop below to make sure a valid mark
   // between [0, 100] is entered before continuing to the if-else if-else

if (mark >= 85)
   {
      grade = 'A';
      cout << "Great Mark. " << endl;
   }
   else if (mark >= 75 && mark < 85)
   {
      grade = 'B';
      cout << "Good Mark. " << endl;
   }
   else if (mark >= 65 && mark < 75)
   {
      grade = 'C';
      cout << "Average Mark. " << endl;
   }
   else if (mark >= 50 && mark < 65)
   {
      grade = 'D';
      cout << "You passed the class. " << endl;
   }
   else
   {
      grade = 'F';
      cout << "You failed the class. " << endl;
   }

cout << "The corresponding character grade is " << grade << endl;

return 0;
}
// end program

When this exercise is completed, the program will ask for a mark. The program will not continue, but will keep looping and asking for marks until a mark between 0 and 100, inclusive, is typed. It will then assign a letter grade to the mark.

Instructions:

Add a do-while loop to complete the program.
The do-while loop will make sure that a valid mark will be obtained before further processing.
Hint: an event-controlled do-while loop is needed
Compile and run the program several times to test it.
Use these test input values: -10, 30, 59, 70, 75, 96, and 108.

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