如何在用户定义列数的情况下将2D数组传递给函数？（C ++）

Question

To exemplify what I am having trouble with. I made this simple program, I tried to read a bunch of tutorials and search my trouble in google but I just did not understand.

#include<iostream>
using namespace std;

void noobFunction( int col , int table[][col]){ // compile error
   table[0][0] = 2;
   cout << table[0][0];
}

int main() {
   cout << "Enter the number of rows in the 2D array:  ";
   int row;
   cin >> row;

   cout << "Enter the number of columns in the 2D array:  ";
   int col;
   cin >> col; 

   int table[lin][col];

   noobFunction(col, table); 

   return 0;
}

Answer 1

Runtime sized arrays are not a C++ standard feature. If you want dynamic 2D arrays use a std::vector<std::vector<int>> :

std::vector<std::vector<int>> table(lin, std::vector<int>(col));;

and define your function as:

void noobFunction(std::vector<std::vector<int>> &table) {
  // ...
}