Whole number to decimals

[plh]

I am writing a c++ program to turn a number into coins. I got the program written and it works perfect if the input is in decimal form. i.e .87 for 87 cents. However, I need to know how to get the user input (87) to convert into a decimal. If the user inputs 87 it changes to 348 quarters. if the user inputs .87 it changes to 3 quarters, 1 dime, o nickles, and 2 pennies.
I'd prefer the user to just enter a whole number... Thanks

#include <iostream>

using namespace std;

int main()
{
double userNumber;
int change, quarters, dimes, nickels, pennies; // declare variables

cout << "Please enter an amount in cents less than a dollar: ";
cin >> userNumber; // input the amount of change

change = userNumber * 100;
quarters = change / 25; // calculate the number of quarters
change = change % 25; // calculate remaining change needed
dimes = change / 10; // calculate the number of dimes
change = change % 10; // calculate remaining change needed
nickels = change / 5; // calculate the number of nickels
pennies = change % 5; // calculate pennies

cout << "\nQuarters: " << quarters << endl; // display # of quarters
cout << " Dimes: " << dimes << endl; // display # of dimes
cout << " Nickels: " << nickels << endl; // display # of nickels
cout << " Pennies: " << pennies << endl; // display # of pennies
return (0);
}

[CodeWriter]

Instead of,
double userNumber;
use
int userNumber;

[MiiNiPaa]

YOu want just 87 for 87 cents? Just don't multiply input by 100.