我无法使用指针数组从main访问函数（在类中）

Question

This is my dice.h

class Dice
{
public:
int value;
int nrOfFaces;
Dice();
void toss();
};

this is my dice.cpp

//this is the default constructor (has no parameter)

Dice::Dice()
{
nrOfFaces = 6;
value = rand() % nrOfFaces + 1;
}

//this function gives the dice a new random value

void Dice::toss()
{
value = rand() % nrOfFaces + 1;

}

To explain a bit on what Im trying to do here. I'll post the code which is in the main at the bottom of this post. In the main code, Im stuck at the part where, as you can see, I declare an array of pointers. Now, Im trying to first toss the 5 dices in one foor loop. and in the other foor loop Im trying to print out the 5 dice's value. But the way Im doing that doesnt seem to work. I dont get error but the program breaks when it gets to pYatzy[i]->toss();

Here is my main.cpp

int main()
{
_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);

//type cast is done in the c++ way
srand(static_cast<unsigned>(time(NULL)));

Dice *dice1 = new Dice;

cout << dice1->value << endl << endl;

dice1->toss();

cout << dice1->value << endl << endl;


for (int i = 0; i < 5; i++)
{

    dice1->toss();
    cout << dice1->value;
    cout << " ";

}

Dice *pYatzy[5];

for (int i = 0; i < 5; i++)
{

    pYatzy[i]->toss();

}

for (int i = 0; i < 5; i++)
{

}

system("pause>nul");
return 0;
}

Thank you!

Answer 1

Here you make 5 uninitialized pointers:

 Dice *pYatzy[5];

and here you dereference the uninitialized pointers, which causes undefined behaviour:

for (int i = 0; i < 5; i++)
{
    pYatzy[i]->toss();

A simple solution would be to replace that code with:

Dice pYatzy[5];
for (int i = 0; i < 5; i++)
{
    pYatzy[i].toss();

Also, earlier on in your code you could write Dice dice1; dice1.toss(); Dice dice1; dice1.toss(); etc., instead of using new . There is no need to use new 99% of the time in C++ .