Here is my first example of a program with functions (see attachment). Try it ou

Question

Here is my first example of a program with functions (see attachment). Try it out.

1. What does it do?

2. What functions does it have?

3. How do the functions exchange data in order to solve the problem?

// Example 1:

// ---------

#include <iostream>

#include <string>

using namespace std;

// function prototypes

double imperialToMetric (int feet, int inches); // converts from feet and inches to cm

int readNonNegInt(string prompt); // reads and validates non-negative integer value

int main ()

{

int feet, inches; // length in feet and inches

double cm; // same length in centimeters

// read and validate feet

feet = readNonNegInt("Enter value for feet: ");

// read and validate inches

inches = readNonNegInt("Enter value for inches: ");

// convert feet and inches to cm

cm = imperialToMetric(feet, inches); // call function, passing arguments

// display result

cout << "This length is " << cm << " centimeters" << endl;

// delay program termination

cout << "Enter any key to finish" << endl;

cin.ignore(2);

return 0;

} // end main

Explanation / Answer

1. It reads in valid feet and inches before converting them to cm. The result is printed out to console. 2. imperialToMetric and readNonNegInt 3. imperialToMetric takes two integers passed by value and returns a double. readNonNegInt takes in one string passed by value and returns an integer.

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