Question

How to get matrix rows and columns (cols) in C++

Answer 1

#include <iostream>

int main() {
    int matrix[3][4] = {
	    {2, 0, 5, 0},
	    {0, 4, 0, 1},
	    {7, 8, 0, 9}
    };
    
    int rows =  sizeof matrix / sizeof matrix[0]; 
    int cols = sizeof matrix[0] / sizeof(int); 

    std::cout << "rows: " << rows << "\n";
    std::cout << "cols: " << cols << "\n";
}




/*
run:
  
rows: 3
cols: 4
  
*/

 

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