Thread: Change maker program remainder troubles.

  1. #1
    Registered User muffinman8641's Avatar
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    Change maker program remainder troubles.

    I have to make a program into which the user enters their bill in a decimal number and the remainder is broken down into dollars, quarters, dimes, nickels and pennies. I learned how to use setprecision(x). Here's my code:
    Code:
    #include <iostream>
    #include <iomanip>
    using namespace std;
    
    int main() {
        double bill, paid, dollars, quarters, dimes, nickels, pennies, remaindol = (paid - bill);
        cout << "Welcome to my change-maker program! " << endl;
        cout << "To begin, press ENTER. " << endl;
        getchar();
        
        restart:
        
        cout << "\n\nEnter how much the bill is. " << endl;
        cout << "Do not use a $ sign. Just enter the decimal number. " << endl;
        cin >> bill;
        cout << "Now enter how much cash you paid. " << endl;
        cin >> paid;
        if (paid < bill) {
                 cout << "Uh-oh! You need to pay more cash. You " << endl;
                 cout << "haven't paid the whole bill yet. " << endl;
                 cout << "You still owe " << setprecision(2) << fixed << (bill - paid) << ". " << endl;
                 goto restart;
                 }
        
        if (bill <= paid) {
                 cout << "You should get " << (paid - bill) << " in change. " << endl;
                 cout << "The most efficient way to get your " << (paid - bill) << " would " << endl;
                 cout << "be to get: " << endl;
                 //need to fit in change. narrow down.
    }
    
    getchar();
    return (0);
    }
    How do I use % to narrow it down? I'm stuck. :[

  2. #2
    Registered User
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    The modulus operator (%) will not work with floating point numbers, so you will have to convert your floating point numbers to an int.


    Jim

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  4. #4
    Registered User muffinman8641's Avatar
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    Sorry, I yet again double posted a new thread.
    A more detailed one is HERE, mods can close this one (thanks for the help btw).

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