Initializing Error: How to create a multi dimensional zero array in C++ -

this code written in c++ make multi dimensional array gives initializing error. size of array should given input console user , not constant value. problem , solution? lot.

#include <iostream> using namespace std; int main() {     int , b ;     cout << "a: " << endl;     cin >> ;      cout << "b: " << endl;     cin >> b ;      int data[a][b] = {{0}};  return 0; } 

the size of array should given input console user , not constant value.

this not possible in c++. suitable replacement using arrays using std::vector. can use:

int = 10, b = 4; std::vector<std::vector<int>> data(a, std::vector<int>(b, 0)); 

if using pre-c++11 compiler, you'll need have space between 2 >>.

std::vector<std::vector<int> > data(a, std::vector<int>(b, 0));