3.4 Functions References and Values

// More tutorials at BrandonHok.com

#include <iostream>

// C++ Crackdown - 3.4 Passing Arguments

// As you have noticed that we have been passing arguments to our functions?
// Yep, you've learned a lot already! We were passing by values by using int in our functions.
// This time we will pass by references and see the differences between the two!

// Do you know what are these statements below called?

// Section 1
// Type the code below until the next section and answer the comments on a separate paper or within your compiler.

void referenceMan(int &);
int valueWoman(int power);


int main()
{
    int reference = 1337;
    int value = 555;

    std::cout << "This is the original reference: " << reference << std::endl;
    referenceMan(reference);
    std::cout << "This is the passed reference: " << reference << std::endl;

    // Section 2
    // Run everything in section 1 before running these lines and watch what happens
    //std::cout << "This is the original value: " << value << std::endl;
    //std::cout << "This is the passed value: " << valueWoman(value) << std::endl;
    //std::cout << "This is the value variable after passing: " << value << std::endl;
    system("pause");
}

void referenceMan(int &reference)
{
    reference = reference * 10;
}

int valueWoman(int power)
{
    int powerup = power * 10;
    return powerup;
}

// Review Questions

// Can you explain to my mom how the entire code above worked? KEEP IT SIMPLE. MOM NEEDS TO KNOW.
// What are the main differences between passing by reference and by value? Did you see the difference between referenceMan and valueWoman?

// Can you create a function that passes by reference? How about a pass by value function? Try it once and try it without looking.