Bills

User enters dollar amount as float
output should be the highest number of bills and coins (TWENTIES, TENS, FIVES, ONES, quarters, dimes, nickels, pennies). Any help is appreciated.

#include <stdio.h>

void main()
{
      unsigned TWENTIES, TENS, FIVES, ONES, quarters, dimes, nickels, pennies;
      float amount_user;

      printf("Enter Dollar amount between $0.00 and $100.00:");
      scanf("%d", &amount_user);
      amount_user=amount_user*100;
      printf("%d, amount_user\n");

      while (amount_user !=0)
      {
            if(amount_user>=2000)
            {
                  amount_user=amount_user/2000;
                  
            }
            else if(amount_user>=1000)
            {
                  amount_user-=1000;
                  TENS++;
            }
            else if(amount_user>=500)
            {
            amount_user-=500;
            FIVES++;
            }
            else if(amount_user>=100)
            {
            amount_user-=100;
            ONES++;
            }
            else if(amount_user>=25)
            {
            amount_user-=25;
            quarters++;
            }
            else if(amount_user>=10)
            {
            amount_user-=10;
            dimes++;
            }
            else if(amount_user>=05)
            {
            amount_user-=5;
            nickels++;
            }
            else if(amount_user>=1)
            {
            amount_user-=1;
            pennies++;
            }
            else
            {
                  break;
            }
      }
      printf("There are %d TWENTIES\n", TWENTIES);
      printf("There are %d TENS\n", TENS);
      printf("There are %d FIVES\n", FIVES);
      printf("There are %d ONES\n", ONES);
      printf("There are %d quarters\n", quarters);
      printf("There are %d dimes\n", dimes);
      printf("There are %d nickels\n", nickels);
      printf("There are %d pennies\n", pennies);
}