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CS 1410 Programming Assignment #3
Fraction Program (Version 1)
Assignment
A fraction is composed of two integers: a numerator and a denominator. There are many
operations in which fractions can participate; four operations are common: addition, subtraction,
multiplication, and division. This is just enough detail (data and functions) to make fractions
interesting demonstrations of structures and functions.
Program Description
1. In a file named fraction.h
a. Create a structure named fraction in with an int numerator and an int
denominator
b. Add function prototypes for the functions defined in step 2 below the struct; also add a
prototype for gcd (included with the assignment)
2. Define (i.e., write the code for) the fraction functions in a file named fraction.cpp
a. Include fraction.h
b. Define four arithmetic functions named add, sub, mult, and div – see Exercise 12, p.
129 for the formulas for the four basic arithmetic operations on fractions). Each function
should accept two fraction structure arguments passed by value and should return the
result as a new fraction structure returned by value.
c. Define a function named print, which accepts one fraction structure passed as a
reference and prints it as num/denom
d. Define function named read that
i. has a fraction pointer argument
ii. reads a fraction from the keyboard (2 separate prompts and 2 separate reads)
(1) prompts for and reads the numerator
(2) prompts for and reads the denominator
iii. returns the fraction through the pointer argument
3. At the end of each arithmetic function, the fraction should be reduced to lowest terms
(however, improper fractions are okay). Reducing a fraction to lowest terms involves finding
the greatest common divisor (i.e., the biggest integer that divides both the numerator and the
denominator evenly). Use the gcd function included with the assignment (copy it into your
program). Assume that the fraction to be reduced is in a fraction structure named f, then the
reduction is done by:
int common = gcd(f.numerator, f.denominator);
f.numerator /= common;
f.denominator /= common;
