C++ :: Program Inputs The Number Of Rows And Columns And Asks For The Entries

I am writing a program that deals with 2d arrays. The program inputs the number of rows and columns and asks for the entries. When the program run and compiles it works perfectly until it outputs then it gives me a warning.

Here is my code:

#include <iostream>
#include <cstdlib>
using namespace std;
int main()
{
int row1=0,col1=0,i,j;
//int a[row1][col1];
int** a= new int*[row1];

[Code]...

I am learning how to do this before I can move on so it can read a text file of numbers.

Also I am having problems with ////delete [] a[];///// I took it out because it made my code compile and run but when I add it in, it gives me an error:

matrixtesting.cpp|56|error: expected primary-expression before ']' token|

I know this expression is suppose to deallocate the array.