:rolleyes:
This is a program where the user enters how much they owe, then they enter how much they are gonna pay, like (30 dollars for a \$25.63 amount), and their change is calculated back to them in ten dollar bills, five dollar bills, one dollar bills, quarters, dimes, nickels, and pennies.

My instructor hinted us to use the mod operator but i found that '%' does not work with doubles or floats. So i am left with no clue on how to program this thing and i dont want to get an F, because so far ive been gettings A's. Its just this darn mod operator is so stubborn. thanks for any help i can get.

here is the code i have.

``````#include <stdio.h>              /* includes stdio.h i/o */

void pause(void);               /* declares function */

int main(void)
{
double due, given, bal = 0;     /* sets double float variables */
double tens, fives, ones, quarters, dimes, nickels, pennies = 0;
printf("\n\n\tHow much do you owe?\n\n\t\tAmount : ");
scanf("%lf", &due);         /* accepts user's input */
printf("\n\n\tHow much will you pay?\n\n\t\tAmount : ");
/* asks user how much they will give to pay for the amount */
scanf("%lf", &given);       /* accepts user's input */
bal = given - due;          /* calculates the user's change */
printf("\n\nAmount Due     = \$%.2lf", due);        /* displays transaction info */
printf("\n\nAmount Given   = \$%.2lf", given);
printf("\n\nAmount Balance = \$%.2lf", bal);
if((bal / 10) >= 1)         /* if can be divided by bill, determines
how many bills */
{
tens = bal / 10;
bal = bal % 10;
}
if((bal / 5) >= 1)         /* if can be divided by bill, determines
how many bills */
{
fives = bal / 5;
bal = bal % 5;
}
if((bal / 1) >= 1)         /* if can be divided by bill, determines
how many bills */
{
ones = bal / 1;
bal = bal % 1;
}
if((bal / .25) >= 1)         /* if can be divided by coin, determines
how many coins */
{
quarters = bal / .25;
bal = bal % .25;
}
if((bal / .10) >= 1)         /* if can be divided by coin, determines
how many coins */
{
dimes = bal / .10;
bal = bal % .10;
}
if((bal / .05) >= 1)         /* if can be divided by coin, determines
how many coins */
{
nickels = bal / .05;
bal = bal % .05;
}
if((bal / .01) >= 1)         /* if can be divided by coin, determines
how many coins */
{
pennies = bal / .01;
bal = bal % .01;
}
printf("\nTens     = %d", tens);         /* prints change resulsts */
printf("\nFives    = %d", fives);
printf("\nOnes     = %d", ones);
printf("\nQuarters = %d", quarters);
printf("\nDimes    = %d", dimes);
printf("\nNickels  = %d", nickels);
printf("\nPennies  = %d", pennies);
pause();                    /* pauses */
return (0);
}
void pause(void)                /* tells what pause does */
{
char ch;                    /* sets character variable */
printf("\n\nPress \'Enter\' to exit.");
scanf("%c", &ch);           /* waits for 'enter' key */
scanf("%c", &ch);
}``````