main.cpp

C++ Source code from a tutorial

#include <iostream>
#include <stdlib.h>

using namespace std;

typedef int *PInt;

int MyFunction2(char *x) {
    *x = 'Z';
}

typedef char *PChar;
int MyFunction3(PChar x) {
    *x = 'Y';
}

int MyFunction(char * &x) {
    x = new char('B');
}

int AnotherFunction(char * *x) {
    *x = new char('C');
}

typedef char **StringArray;
typedef char *PChar;

//int ChangeAsReference(StringArray &array) {
int ChangeAsReference(char **&array) {
    StringArray NameArray = new PChar[3];
    NameArray[0] = "Tom";
    NameArray[1] = "Harry";
    NameArray[2] = "Suzy";
    array = NameArray;
}

//int ChangeAsPointer(StringArray *array) {
int ChangeAsPointer(char ***array) {
    StringArray NameArray = new PChar[3];
    NameArray[0] = "Tom";
    NameArray[1] = "Harry";
    NameArray[2] = "Suzy";
    *array = NameArray;
}


int main(int argc, StringArray argv)
{
    char orig = 'A';
    MyFunction2(&orig);
    cout << orig << endl;
    
    MyFunction3(&orig);
    cout << orig << endl;

    
    cout << "***Another***" << endl;
    char *ptr = new char('A');
    char *copy = ptr;
    AnotherFunction(&ptr);
    cout << "ptr points to " << *ptr << endl;
    cout << "copy points to " << *copy << endl;
    
    cout << "***Array of strings***" << endl;
    StringArray OrigList = new PChar[3];
    OrigList[0] = "John";
    OrigList[1] = "Paul";
    OrigList[2] = "George";
    StringArray CopyList = OrigList;
    ChangeAsPointer(&OrigList);
    cout << OrigList[0] << endl;
    cout << OrigList[1] << endl;
    cout << OrigList[2] << endl << endl;
    cout << CopyList[0] << endl;
    cout << CopyList[1] << endl;
    cout << CopyList[2] << endl;
    
    
    
    system("PAUSE");	
    return 0;
}