C++ :: Pass By Value And Results By Variable Program
Jun 7, 2014
The instructions: A nutritionist who works for a fitness club facilitate members by evaluating their diets.As part of her evaluation, she asks members for the number of fat grams and carbohydrate grams that they consume in a day. Then, she calculates the number of calories that results from the fat using the following formula:
Calories from fat = fat grams x 9
Next, she calculates the number of calories that result from the carbohydrates using the following formula:
Calories from Carbs = Carbs grams x 4
Create an application that will make these calculations
-DO NOT use global variables
-Create two variables in main that will hold the two results
-Pass fat and carbs by value, and the result variables by reference
-Output in main
The key with what you need to pass is this: Pass fat and carbs by value, and the result variables by reference. This is what I have to far but I don't understand how to "pass by value, and results by variable" ....
#include <iostream>
using namespace std;
void grams (int);
void calories ();
int main () {
//Get fat and carb grams
In a project I am working on, I have to initialize a window and pass it as a parameter to another constructor, but before the window is initialized, it is passed as a parameter thus causing an error. Here is some code :
Game::Game() : mWindow(sf::VideoMode(640, 480), "SFML Application", sf::Style::Close) , mWorld(mWindow) //<---- right here is where the mWindow variable needs to be passed { //... }
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I have attached my header, driver and class files below along with accompanying error messages below them
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I've been given an assignment with the below questions.
1. What is the difference between pass by reference & pass by pointers?
2. What is the use of the initialization list in the constructor?
3. What is meant by a reference & its advantage?
4. Class has a reference, pointer and a const. Is it possible to write the copy constructor & assignment operator overloading funciton? how? ( Since reference is there, I'm not sure on how to write for it)
5. Example for a variable decleration and definition? (I know for function but for variable don kw how)
6. static and const static what is the difference??
i think i understand both concept. i know that pass by value is that the function receiving those values makes actually a copy of those parameters. Passing by reference makes the variable in the main function to actually see those changes in the other function, instead of a copy, and apply them to the variable in the main function. my question is, why would i pass it by reference if i just can make a return type function.
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Code: /* * time.h
* This file has no copyright assigned and is placed in the Public Domain. * This file is a part of the mingw-runtime package. * No warranty is given; refer to the file DISCLAIMER within the package. * * Date and time functions and types. * */
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I'm supposed to write a program that:
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Please enter an integer: 4 Please enter an operation (+, - , *, /): * Please enter another integer: 5
4 * 5 = 20
Code: #include <iostream> using namespace std; int main() { int x; int c; int d; char e;
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#include <iostream> #include <cmath> #include <iomanip> int main() { using namespace std; float totalF = 0;//total amount earned after number of days specified by user have passed
