问带浮点的C语言中的现金除法错误

EN

#include <cs50.h>
#include <stdio.h>

int main(void)
{
    // change
    float change = get_float("how much change is owed?: ");
    int coins = 0;

    //reprompt
    while (change < 0)
    {
        change = get_float("how much change is owed?: ");
    }

    //quarter
    float quarter = 0.25;
    float quarters = change / quarter;
    quarters = (int) quarters;
    change = change - (quarters * quarter);

    printf("%f quarters\n", quarters);

    //dimes
    float dime = 0.10;
    float dimes = change / dime;
    dimes = (int) dimes;
    change = change - (dimes * dime);

    printf("%f dimes\n", dimes);

    //nickels
    float nickel = 0.05;
    float nickels = change / nickel;
    nickels = (int) nickels;
    change = change - (nickels * nickel);

    printf("%f nickels\n", nickels);
    printf("%f in change left change\n", change);

    //pennies
    float penny = 0.010000;
    float pennies = change / penny;
    pennies = (int) pennies;
    change = change - (pennies * penny);

    printf("%f pennies\n", pennies);

    //coins
    coins = quarters + dimes + nickels + pennies;
    printf("%i\n", coins);

    //printf("%f\n", change);
}