User define array size

Asked Apr 27 '18 at 14:48

Active Apr 27 '18 at 14:49

Viewed 55 times

I found a difficulty on creating an array with user defined size. It shows error, can anybody teach me how to do this?

int main()
{
    int row, column;
    cout << "Enter the amount of row" << endl;
    cin >> row;
    cout << "Enter the amount of column" << endl;
    cin >> column;
    int array[row][column]; //the value of variable cannot be used as a constant
    system("pause");
}

edited Apr 27 '18 at 14:49

Paul R

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asked Apr 27 '18 at 14:48

JC YOUNG

6

You can do that in C, but not in C++. Use `std::vector` instead. – Paul R Apr 27 '18 at 14:49
Older duplicate [here](https://stackoverflow.com/questions/14459248/how-to-create-an-array-when-the-size-is-a-variable-not-a-constant), but the accepted answer is not recommended in modern C++ code. – patatahooligan Apr 27 '18 at 14:58
Dynamically allocate the array. Hint: use `operator new`. – Thomas Matthews Apr 27 '18 at 15:49
May you show me how to achieve it? – JC YOUNG Apr 30 '18 at 03:25

User define array size

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