how to assign values to the first dimension in multi dimensional array then assign values to the second like (x,y) . then output

Question

#include <iostream>

using namespace std;

int main ()
{
int sum ;
int x , y ;
int z [x][y];

for (x=0; x<3 ;x++)
{
z[x]=1+x;
cout << z[x]<<" ";
}
cout << endl;

for (y=0 ; y<4 ;y++)
{
z[y]=2+y;
cout << z[y] << " ";
}

cout << z[0][0];

return 0;
}

Answer 1

I don't understand your idea. But I just noticed a possibility for problem.

int x, y;
// these variables are uninitialized
// and contain garbage values.
int z[x][y];
// use of garbage values in array definition.