getline() not waiting for user input

Question

I have a code that is supposed to use user input to take an order of a pizza.

#include<iostream>
#include<string>
using namespace std;

int main()
{
double totalCosts = 0;

// PIZZA

cout << "What size is your first pizza?\n"
        "small:    $8.00\n"
        "medium:  $10.00\n"
        "large:   $12.00\n";
string currentSize = "";
getline(cin, currentSize);
cout << "\n";
if(currentSize == "small")
{
    totalCosts += 8;
}
else if(currentSize == "medium")
{
    totalCosts += 10;
}
else if(currentSize == "large")
{
    totalCosts += 12;
}
else
{
    cout << "invalid size: " << currentSize;
    return 0;
}

string pizzaToppings = "";
cout << "Choose from the following toppings:\n"
        "onions:    $1.00\n"
        "peppers:   $1.20\n"
        "ham:       $1.50\n"
        "hamburger: $1.25\n"
        "pepperoni: $1.55\n"
        "salami:    $1.63\n"
        "sausage:   $1.44\n";
getline(cin, pizzaToppings);
cout << "\n";
if(pizzaToppings.find("onions") != string::npos)
{
    totalCosts += 1;
}
else if(pizzaToppings.find("peppers") != string::npos)
{
    totalCosts += 1.2;
}
else if(pizzaToppings.find("ham") != string::npos)
{
    totalCosts += 1.5;
}
else if(pizzaToppings.find("hamburger") != string::npos)
{
    totalCosts += 1.25;
}
else if(pizzaToppings.find("pepperoni") != string::npos)
{
    totalCosts += 1.55;
}
else if(pizzaToppings.find("salami") != string::npos)
{
    totalCosts += 1.63;
}
else if(pizzaToppings.find("sausage") != string::npos)
{
    totalCosts += 1.44;
}
else
{
    cout << "Choose at least one valid topping";
    return 0;
}

// DELIVERY AND FINAL PRINTOUT

string needToDeliver = "";
cout << "Do you want delivery? yes/no\n";
getline(cin, needToDeliver);
cout << "\n";
if(needToDeliver == "yes")
{
    totalCosts += 3;
    cout << "What is your address?";
    getline(cin, needToDeliver); // address doesn't matter
}

cout << "Your total cost is: $" << totalCosts << ". Thank you for buying C++ Pizza.";
return 0;
}

This code gives the following output:

What size is your first pizza?

small: $8.00

medium: $10.00

large: $12.00

invalid size:

What I think is happening is the first getline function is not waiting for any user input, and is instead inputing an empty string. Why is it doing this?

Please reduce your program to a minimal example that reproduces your issue. It shouldn't be more than 20 lines of code in this case. Along the way you might even figure out the solution yourself! — John Zwinck, Apr 28 '13 at 03:28
seems working fine here if you input small: http://ideone.com/VYxaxP (no topping is selected) — taocp, Apr 28 '13 at 03:29
In what kind of computer are you compiling and running this program? It works just fine on my computer. Are you using Visual Studio or any other IDE? — ILikeTacos, Apr 28 '13 at 03:51

getline() not waiting for user input

0 Answers0