Thread: A little trouble with my self-study homework?

We were asked to write a dollar converter program that accepts a dollar value and convert to its equivalent value in quarters, dimes, nickles and cents.

and this is as far as I've come to realizing the program... and this is just the base.... we need to convert it using the mod(%) but I have no idea how to...

Our professor gave us the value of the dollars... (it's because we're not in America or anything)

1 dollar = 100 cents
1 quarter = 25 cents
1 dime = 10 cents
1 nickle = 5 cents

Code:

#include<stdio.h>
#include<conio.h>

int main()
{
    float ItemPrice, total, cash, change;
    int quantity;
    
    printf("\nAling Puring's Store v.3\n");
    
    printf("\nEnter item price: ");
    scanf("%f", &ItemPrice);
    
    printf("\nEnter quantity: ");
    scanf("%d", &quantity);
    
    total=ItemPrice*quantity;
    
    printf("\nTotal is: %.2f", total);
    
    printf("\n\n******************************\n");
    
    printf("\nCash is: ");
    scanf("%f", &cash);
    
    change=cash-total;
    
    printf("\nChange is: %.2f", change);
    
    getch();
    return 0;
}

I ABSOLUTELY HAVE NO IDEA ON HOW TO USE A modulus(%)... and that's the clue our professor gave us

hello

I am studying a book that has this program in, the book is called "ansi c" by steven c lawlor.

Code:

#include <stdio.h>
main()
{
 int seconds;
 printf("How many seconds? ");
 scanf("%i", &seconds);                                    //input how many seconds
 printf("Days:      %i \n", seconds / 86400);       //seconds divided by how many seconds in a day
 seconds %= 86400;                                        //assign to seconds the remainder after dividing seconds by 86400 (the number of seconds in a day)
 printf("Hours:     %i \n", seconds / 60 / 60);
 seconds %= 3600;
 printf("Minutes:   %i \n", seconds / 60);
 seconds %= 60;
 printf("Seconds:   %i \n", seconds / 1);
}

this is how you would use modulo, I had to keep track of 7.73 dollars worth of pennies and I could only have the int pennies and nothing else. so assign a value to pennies = 773.
then use this value to find dollars,
print this then use modulo which I think is this,
pennies %= 700,
this should make pennies = 73,
divide this by 50 and print value of 1,
assign new value to pennies using modulo,
pennies %= 73

I think this is right