[C++] Dynamic Memory Allocation(compare malloc with new)

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>

using namespace std;

/* malloc & free *//*
char* MakeStrAdr(int len)
{
	char* str = (char*)malloc(sizeof(char) * len);
	return str;
}
*/

/* new & delete *//*
char* MakeStrAdr(int len)
{
	char* str = new char[len];
	return str;
}
*/

class Simple
{
public:
	Simple()
	{
		cout << "Simple Constructor" << endl;
	}
	int a = 10;
};

int main(void)
{
	/* malloc *//*
	char* str = MakeStrAdr(20);
	strcpy(str, "I am malloc");
	cout << str << endl;
	free(str);
	*/

	/* new *//*
	char* str = MakeStrAdr(20);
	strcpy(str, "I am new");
	cout << str << endl;
	delete []str;
	*/

	cout << "case 1: ";
	Simple* sp1 = new Simple;
	cout << sp1->a << endl;	// Access operator ->
	
	/* Reference */
	Simple& clone = *sp1;
	cout << clone.a << endl;	// Access operator .

	cout << "case 2: ";
	Simple* sp2 = (Simple*)malloc(sizeof(Simple) * 1);

	cout << endl << "end of main" << endl;
	delete sp1;
	free(sp2);

	return 0;
}