morning code challenge week 13

codeChallengeWeek13.swift

import Foundation

func makeChangeAsString(fromAmount: Double, withCost: Double) -> String {
    guard fromAmount >= withCost else { return "Invalid change"}
    let change = fromAmount - withCost
    var changeInCent = Int(change * 100)
    let dollar = changeInCent / 100
    changeInCent -= dollar * 100
    let quarter = changeInCent / 25
    changeInCent -= quarter * 25
    let dime = changeInCent / 10
    changeInCent -= dime * 10
    let nickel = changeInCent / 5
    changeInCent -= nickel * 5
    let penny = changeInCent
    
    return "Your change is $\(change). That is \(dollar) dollars, \(quarter) quarters, \(dime) dime, \(nickel) nickels and \(penny) pennies."
}

makeChangeAsString(fromAmount: 5.00, withCost: 2.15)  // returns "Your change is $2.85. That is 2 dollars, 3 quarters, 1 dime, 0 nickels and 0 pennies."
makeChangeAsString(fromAmount: 10.00, withCost: 2.38) // returns "Your change is $7.62. That is 7 dollars, 2 quarters, 1 dime, 0 nickels and 2 pennies."