Example 6 at Library.

Example 6 at Library.cpp

#include <iostream>

using namespace std;

char * myFunction(const char * str)
{
	//Declare the fixed size array of 32 ize.
	char fixedSizeArray[32];
	//Copy str into it.
	strcpy(fixedSizeArray, str);
	//Return it.
	return fixedSizeArray;
	//Althout it does not result in a compiler error, it fails because it's returning the address of temporary data (myFixedArray)
}

char * myGoodFunction(const char * str)
{
	//In order to make it work:
	//Declare new pointer, and initialize it to a new character array of 32 size.
	char * dynamicArray = new char[32];
	//Copy str into it.
	strcpy(dynamicArray, str);
	//Return it.
	return dynamicArray;
	//Note that if we do not keep track of the returned data, it results in a memory leak (since a new object was dynamically created.)
}

void main()
{
	//Print result of myFunction with "Teeeeesting!" as the argument.
	cout << myFunction("Teeeeesting!") << endl;

	//Get result of myGoodFunction with "Teeeeesting!" as the argument.
	//Needs to be done to avoid a memory leak.
	char * result = myGoodFunction("Teeeeesting!");
	//Print out result.
	cout << result << endl;

	//Delete result. For deleting an array, delete requires the empty [].
	//Otherwise delete things it's just getting a pointer to a single item, rather than array.
	//So if [] was left off, it would assume that it was only getting a pointer to the first character in result.
	delete [] result;
}