I need help with this c++ comework questions. Thanks in advance! Exercise 1: Run
ID: 3555754 • Letter: I
Question
I need help with this c++ comework questions. Thanks in advance!
Exercise 1: Run the program several times with various inputs.
Exercise 2: Notice the following do-while loop which appears near the end of the program:
do
{
cout << "Would you like to find the average for another month?";
cout << endl << "Enter Y or N" << endl;
cin >> choice;
} while(toupper(choice) != 'Y' && toupper(choice) != 'N');
How would the execution of the program be different if we removed this loop? Try removing the loop but leave the following lines in the program:
cout << "Would you like to find the average for another month?";
cout << endl << "Enter Y or N" << endl;
cin >> choice;
Record what happens when you run the new version of the program using comments in the .cpp file.
Exercise 3: Alter program case_convert.cpp so that it performs the same task but uses tolower rather than toupper.
#include <iostream>
#include <cctype>
#include <iomanip>
using namespace std;
int main()
{
int week, total, dollars;
float average;
char choice;
cout << showpoint << fixed << setprecision(2);
do
{
total = 0;
for(week = 1;week <= 4;week++)
{
cout << "How much (to the nearest dollar) did you"
<<" spend on food during week " << week << " ?:" << endl;
cin >> dollars;
total = total + dollars;
}
average = total / 4.0;
cout << "Your weekly food bill over the chosen month is $"
<< average << endl << endl;
do
{
cout << "Would you like to find the average for another month?";
cout << endl << "Enter Y or N" << endl;
cin >> choice;
} while(toupper(choice) != 'Y' && toupper(choice) != 'N');
} while (toupper(choice) == 'Y');
return 0;
}
Explanation / Answer
If you don't remove the required do... while loop, the following will happen:
The program will prompt the user asking whether he wants to continue or not(asking to enter the values - y, Y, n or N)... If the user enters any other value(example - x, p , P etc), it will ask to re-enter the value. The program will end only when the user enters n or N.
When we remove that inner do while loop, the following will happen:
the program will end for any value entered other than 'Y' or 'y'(like if you press x, y, N etc, the program will end) when asked whether he wants to continue or not, and repeat only for 'Y' or 'y'..