Minesweeper Game in C++

#include<iostream>
#include <stdlib.h>
#include<conio.h>
using namespace std;


void main()
{
  int option;
  int counter=0;
  cout<<"for easy enter 1, for hard enter 2: ";
  cin>>option;
  cout<<endl;
  while(option!=1&&option!=2)
  {
cout<<"enter 1 or 2: ";
cin>>option;
cout<<endl;
  }
  int mainArray[10][10];         //main array which has the values
  if(option==1)
  {
srand(time(0));
for(int i=0;i<10;i++)
{
for(int j=0;j<10;j++)
{mainArray[i][j]=0 + rand()% 7;}
}
  }

  if(option==2)
  {
srand(time(0));
for(int d=0;d<10;d++)
{
for(int f=0;f<10;f++)
{mainArray[d][f]=0 + rand()% 4;}
}
  }
  char dispArray[10][10];        //array to be displayed
  for(int k=0;k<10;k++)
  { cout<<endl;
for(int l=0;l<10;l++)
{
dispArray[k][l]='*';
cout<<dispArray[k][l]<<"   ";
}

  }

  int row;
  int column;
  do{
cout<<endl;
cout<<"\nEnter Row number (0 to 9): ";
cin>>row;
cout<<"Enter Column number (0 to 9): ";
cin>>column;
if(mainArray[row][column]!=0)
{
 counter++;

}
      clrscr();
dispArray[row][column]=(char)(mainArray[row][column]+48);         //int converted it into char by its ASCII code
for(int p=0;p<10;p++)
{ cout<<endl;
 for(int q=0;q<10;q++)
 {
cout<<dispArray[p][q]<<"   ";
 }
}
}
  while(mainArray[row][column]!=0);


  cout<<"\n\ngame over"<<endl<<"total score= "<<counter;
  _getch();
}