Example 2 at Library

gistfile1.cpp

#include <iostream>

using namespace std;

#define ARRAY_SIZE 128

void lol(const int); //Function header for lol.

int main()
{
	char staticArray[ARRAY_SIZE]; //Static. Generated on main initialization. Memory managed by progam.


	//Char * is a pointer to a character.
	char * dynamicArray = new char[ARRAY_SIZE]; //New [size] returns a pointer to the address of the first value.


	strcpy(staticArray, "Hello!"); //String copy arguments: (destination, source).
	//Strcpy goes based on the strlen of the the source.
	//Strlen determines the length of the string by finding the first character that is set to 0. Not the character '0', but the value 0.

	cout << staticArray << endl; //Print static array.

	
	strcpy(dynamicArray, "Things"); //Copy from "Things" to dynamicArray.

	cout << "Length of dynamicArray: " << strlen(dynamicArray) << endl; //Strlen returns an int and takes a const char * as the argument.

	cout << dynamicArray << endl; //Print dynamic array.

	cout << dynamicArray[2] << endl; //Print dynamic array at 2.

	//The [] operator is the same as:
	//*(pointer + index);

	cout << *(dynamicArray + 2) << endl; //Print the character at an offset of 2. Note the de-reference.

	strcpy(dynamicArray + strlen(dynamicArray), " and more."); //Equal to strcat(dynamicArray, "and more.");

	cout << dynamicArray << endl; //Print it.


	//Always clean up dynamic arrays when you're done with them. Otherwise the world will end.
	delete [] dynamicArray; //Note the [] on delete. It let compiler know that it's deleting an array.

	//staticArray is automatically cleaned up by the program.



	int notconst = 0; //Always make sure to set variables before using them.
	//Example of passing something to lol (function):
	lol(notconst); //Argument does not have to be a constant.
	//Const just means that, from the perspective of the function, it is constant.
	notconst = 1; //Still not constant.

	return 0; //Result to be sent back to the OS once this is complete.
}

void lol(const int notlol)
{
	//Can't change notlol here.
}