Given four values representing counts of quarters, dimes, nickels and pennies, output the total amount as dollars and cents.

Question

Code must be done in C.

Output each floating-point value with two digits after the decimal point, which can be achieved as follows:

printf("Amount: $%0.2lf\n", dollars);

Ex: If the input is: 4 3 2 1

where 4 is the number of quarters, 3 is the number of dimes, 2 is the number of nickels, and 1 is the number of pennies, the output is: $1.41

For simplicity, assume input is non-negative.

Answer 1

#include <stdio.h>

#include <stdlib.h>

#include <math.h>

double dollars(long quarters, long dimes,

long nickels, long pennies) {

double result = quarters / 4.0 +

dimes / 10.0 +

nickels / 20.0 +

pennies / 100.0;

return round(100.0 * result) / 100.0;

}

int main(int argc, const char* argv[]) {

// argv[0] is program name in C/C++ (coins)

if (argc != 5) {

// "string a" "string b"

// concatenates strings a and b

fprintf(stderr,

"Usage: coins quarters dimes "

"nickels pennies\n");

exit(-1);

}

// correct number of input parameters

// go ahead and do the conversions

int quarters = atoi(argv[1]);

int dimes = atoi(argv[2]);

int nickels = atoi(argv[3]);

int pennies = atoi(argv[4]);

printf("Amount: $%0.2lf\n",

dollars(quarters, dimes,

nickels, pennies));

return 0; // success !

}

//================================================

// OUTPUT (example)

//================================================

// % ./coins 4 3 2 1

// Amount: $1.41