Question

This is for a C++ program:
I'm almost done with this program, I just need to implement a bool function that will ask the user if they want to repeat the read_course function. I can't seem to get it right, the instructions suggest a do.. while loop in the main function. here is my code

#include <iostream>
#include <cstring>
#include <cctype>
using namespace std;
const int SIZE = 100;

void read_name(char first[], char last[]);
void read_course(int & crn, char des[], int & section);
bool again();

int main()
{
    char user_input;
    char first[SIZE];
    char last[SIZE];
    char des[SIZE];
    int section = 0;
    int crn = 0;

    read_name(first, last);
    do
    {
    read_course(crn, des, section);
      
    cout << "Name: " << last << ", " << first << endl;
    cout << "CRN: " <<crn <<endl<< "Destignator: " << des <<endl;
    cout << "Section: " << section << endl;

    again();
    while(again == true);

     return 0;
}

void read_name(char first[], char last[])
{

    cout << "Enter your first name then press enter: " << endl;
    cin.get(first, SIZE, '\n');
    cin.ignore(100, '\n');

    cout << "Enter your last name then press enter: " << endl;
    cin.get(last, SIZE, '\n');
    cin.ignore(100, '\n');

}

void read_course(int & crn, char des[], int & section)
{
    cout << "Enter valid CRN (e.g. 123456): " << endl;
    cin >> crn;
    if(crn <= 0)
    {
        cout << "Please enter a valid CRN: " << endl;
        cin >> crn;
    }
    cin.ignore(100, '\n');

    cout << "Enter Course Designator: " << endl;
    cin.get(des, SIZE, '\n');
    cin.ignore(100, '\n');
    for(int i = 0;des[i]<SIZE; ++i)
    {
        if(des[i] == ' ')
        {
            cout << "Do not enter spaces. " << endl;
            cout << "Enter Course Designator: " << endl;
            cin.get(des, SIZE, '\n');
        }
    }

    cout << "Enter section: " << endl;
    cin >> section;
    if(section <= 0)
    {
        cout << "Do not enter a negative number, Enter section: " << endl;
        cin >> section;
    }
    cin.ignore(100, '\n');

}

bool again()
{
    char user_input;
    user_input = toupper(user_input);
    cout << "Do you want to enter another class? (Y/N): " << endl;
    cin >> user_input;

    if(user_input != 'Y' || user_input != 'N')
    {
        cout << "Invalid selection, Please try again." << endl << endl;
        cout << "Do you want to continue to enroll classes? (y/n): " << endl;
        cin >> user_input;
    }
    if(user_input == 'Y')
        return true;
}

Answer 1

#include <iostream>
#include <cstring>
#include <cctype>
using namespace std;
const int SIZE = 100;

void read_name(char first[], char last[]);
void read_course(int & crn, char des[], int & section);
bool again();

int main()
{
char first[SIZE];
char last[SIZE];
char des[SIZE];
int section = 0;
int crn = 0;

read_name(first, last);
do
{
read_course(crn, des, section);

cout << "Name: " << last << ", " << first << endl;
cout << "CRN: " <<crn <<endl<< "Destignator: " << des <<endl;
cout << "Section: " << section << endl;
}
while(again() == true); // Call again() function and compare its return value.
return 0;
}

void read_name(char first[], char last[])
{
cout << "Enter your first name then press enter: " << endl;
cin.get(first, SIZE, '\n');
cin.ignore(100, '\n');

cout << "Enter your last name then press enter: " << endl;
cin.get(last, SIZE, '\n');
cin.ignore(100, '\n');

}

void read_course(int & crn, char des[], int & section)
{
cout << "Enter valid CRN (e.g. 123456): " << endl;
cin >> crn;
if(crn <= 0)
{
cout << "Please enter a valid CRN: " << endl;
cin >> crn;
}
cin.ignore(100, '\n');

cout << "Enter Course Designator: " << endl;
cin.get(des, SIZE, '\n');
cin.ignore(100, '\n');
for(int i = 0; des[i]<SIZE; ++i)
{
if(des[i] == ' ')
{
cout << "Do not enter spaces. " << endl;
cout << "Enter Course Designator: " << endl;
cin.get(des, SIZE, '\n');
}
}

cout << "Enter section: " << endl;
cin >> section;
if(section <= 0)
{
cout << "Do not enter a negative number, Enter section: " << endl;
cin >> section;
}
cin.ignore(100, '\n');
}

bool again()
{
char user_input;
cout << "Do you want to enter another class? (Y/N): " << endl;
cin >> user_input; // Take input for user_input from user
user_input = toupper(user_input); // Convert it to uppercase

// Validate user_input. If it's not Y or N, keep asking user to enter a valid value
// DO this in a while loop
while(user_input != 'Y' && user_input != 'N')
{
cout << "Invalid selection, Please try again." << endl << endl;
cout << "Do you want to continue to enroll classes? (y/n): " << endl;
cin >> user_input;
user_input = toupper(user_input); // Convert it to uppercase
}
cin.ignore(100, '\n');

// If user_input is Y, return true else false
if(user_input == 'Y')
return true;
else
return false;
}

OUTPUT

EAPractice CheggC++\bin\Release\CheggC++.exe Enter your first name then press enter: Jane Enter your last name then press enter Doe Enter valid CRN (e.g. 123456) 111111 Enter Course Designator: abc Enter section: 1 Name: Doe, Jane CRN: 111111 Destignator: abc Section: 1 Do you want to enter another class? (Y/N) y Enter valid CRN (e.g. 123456) 423313 Enter Course Designator: хуz Enter section: 2 Name: Doe, Jane CRN: 423313 Destignator: xyz Section: 2 Do you want to enter another class? (Y/N): Process returned 0 (ex0) Press any key to continue. execution time : 34.987 s