How do I input numbers in array

Question

I tried to input numbers in arr[n][m], but there is the problem, that numbers in an array should be constants, that's why I tried to do this:

int n,m;
cin>>n>>m;
int *arr= new int[n][m];

But it doesn't work for m, what should I do?

When you say that it "doesn't work", I assume you are seeing a compile-time error about unknown array dimensions? Could you please include the exact error message from the compiler? — NicholasM, Nov 16 '19 at 16:25
You need to understand how arrays are created and handled without `cin` first. — lakeweb, Nov 16 '19 at 16:27
error: the value of ‘m’ is not usable in a constant expression that's the error message — IvanCompSci2003, Nov 16 '19 at 16:28

score 0 · Accepted Answer · answered Nov 16 '19 at 16:28

0

Although you are suggested to use std::vector. But as per question to allocated 2-D array you should do.

int row,column;
cin>>row>>column;
int** arr = new int*[row];
for(int i = 0; i < row; ++i)
    arr[i] = new int[column];

answered Nov 16 '19 at 16:28

Nikhil Badyal

1 Answers1