无效操作数和非法赋值转换

此程序的目的是获取一个美元金额并打印将要返回的票据数量,以最有效地给出该金额和剩余的零钱(i、 e.$523.33=$50 x 10/$20 x1/$1 x 3/.33剩余)。它应该工作除了错误,我在附加的图像。我试过我所学的每一次铸造,但都不管用。

#include <iostream>
using namespace std;


int main()
{
    double withdrawAmount; //declare variable to store use input for desired withdraw amount

    do { //Ask for valid user input
       cout << "Please enter an amount to withdraw from yor account" << endl;
       cin >> withdrawAmount; //save user input into withdrawAmount variable
   } while (withdrawAmount < 1);

   //Print greatest # of bills that can be taken from the withdrawlAmount
     cout << "$50 bills :"<< (int) withdrawAmount / 50 << endl;    
   //Print number of $50 bills
     (int) withdrawAmount %= 50;
     cout << "$20 bills: " << (int) (withdrawAmount %= 50) / 20 << endl; 
   //Print number of $20 bills
     (int) withdrawAmount %= 20;
     cout << "$10 bills: " << (int) (withdrawAmount %= 20) / 10 << endl; 
  //Print number of $10 bills
   (int)withdrawAmount %= 10;
   cout << "$5 bills: " << (int) (withdrawAmount %= 10) / 5 << endl; 
  //Print number of $5 bills
   (int)withdrawAmount %= 5;
   cout << "$1 bills: " << (int) (withdrawAmount %= 5) / 1 << endl; 
  //Print number of $1 bills
   (int) withdrawAmount %= 1;
   cout << "Remaining: " << withdrawAmount / 1 << endl;
   return 0;
}