Answered: Q4: Re-write the code using do-while…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Q4: Re-write the code using do-while and for loop.

// Class average program with sentinel-controlled repetition.
#include <iostream>
using std::cout;
using std::cin;
using std::endl;
using std::fixed;
#include <iomanip>
using std::setprecision;
int main()
{
int total;
int gradeCounter;
int grade;
double average;
total = 0;
gradeCounter = 0;
cout << "Enter grade, -1 to end: ";
cin >> grade;
while ( grade != -1 ) {
total = total + grade;
gradeCounter = gradeCounter + 1;
cout << "Enter grade, -1 to end: ";
cin >> grade;
}
if ( gradeCounter != 0 ) {
average = static_cast< double >( total ) / gradeCounter;
cout << "Class average is " << setprecision( 2 )
<< fixed << average << endl;
} // end if part of if/else
else
cout << "No grades were entered" << endl;

return 0;
} // end function main

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