Array initialization of local variables

  When the array is not a global variable ：
            If the array size is a variable , Then the array is initialized to 0 when , The value of the element may not be 0;
            If the array size is constant , Then the array is initialized to 0 when , The value of the element is 0;

/**
     When the array is not a global variable ：
             If the array size is a variable , Then the array is initialized to 0 when , The value of the element may not be 0;
             If the array size is constant , Then the array is initialized to 0 when , The value of the element is 0;
*/


#include <iostream>
using namespace std;
const int maxn=10;
int main()
{
    cout << " Array size is a variable :\n";
    cout << " Enter two values :\n";
    int n, m;
    cin >> n >> m;
    int temp[n][m]={0};
    for(int i=0;i<n;++i)
        for(int j=0;j<m;++j)
            cout << temp[i][j] << ' ';
    cout << "\n The array size is const  Constant of type ：\n";
    int matr[maxn][maxn]={0};
    for(int i=0;i<maxn;++i)
        for(int j=0;j<maxn;++j)
            cout << matr[i][j] << ' ';
    cout << "\n The array size is  common  Constant :\n";
    int a[10][10]={0};
    for(int i=0;i<10;++i)
        for(int j=0;j<10;++j)
        cout << a[i][j] << ' ';
}