В двумерном массиве

#include <iostream.h>
#include <stdio.h>
#include <conio.h>
 
const int MAX_COL = 12;
const int MAX_ROW = 18;
 
main()
{
clrscr();
 
double x[MAX_ROW][MAX_COL] = {
1,2,3,4,5,6,7,8,9,55,56,56,
4,5,6,5,6,6,4,3,3,45,45,45,
4,2,4,5,6,7,8,5,5,34,23,45,
5,6,6,6,6,6,5,5,4,54,45,55,
4,4,5,5,5,4,3,3,3,45,45,45,
5,6,4,5,6,5,5,4,4,56,35,56,
4,6,4,6,4,6,5,5,5,45,23,45,
5,5,7,9,6,4,3,2,5,45,45,34,
4,5,6,5,3,7,7,6,4,23,86,56,
5,3,4,4,5,5,5,5,5,45,45,45,
4,2,4,5,6,7,8,5,5,34,23,45,
5,6,6,6,6,6,5,5,4,54,45,55,
4,4,5,5,5,4,3,3,3,45,45,45,
5,6,4,5,6,5,5,4,4,56,35,56,
4,6,4,6,4,6,5,5,5,45,23,45,
5,5,7,9,6,4,3,2,5,45,45,34,
4,5,6,5,3,7,7,6,4,23,86,56,
5,3,4,4,5,5,5,5,5,45,45,45//elements of matrix
};
 
double sum, sumx,sumy, mean;
int rows = MAX_ROW, columns = MAX_COL;
 
cout << "Matrix :\n";
//disp elements of matrix
for (int i = 0; i < rows; i++) {
  for (int j = 0; j < columns; j++) {
  cout.width(4);
  cout.precision(1);
  cout << x[i][j] << " ";
                                                 }
    cout << "\n";                }
    cout << "\n";
 
sum = rows;
 
//reseved sum of each columns
for (int j = 0; j < columns; j++) {
//init sumation
 sumy=0.0;
     for(i=0;i< rows;i++)
     sumy+= x[i][6];
 
    //  cout<<"\n Obwaa zarplata za Iun zarplata="<<sumy<<"\n";
sumx = 0.0;
for (i = 0; i < rows; i++)
      sumx += x[i][j];
 mean = sumx / sum;
 cout << "Averadg zarplata za mesyaz " << j
        << " = " << mean << "\n";
         // cout<<"\n Obwaa zarplata za Iun zarplata="<<sumy<<"\n";
 
               printf("\Obwaa zarplata za Iun=%d",sumy);
 
 
                                                    }
 
         cin.get ();