Row Average, column Average and Matrix Average of a Random Matrix

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
#define max 5

int mat[max][max];

void main()
{
int i,j;
int row_sum[max];
int col_sum[max];
int mat_sum = 0;
clrscr();
randomize();
printf("\n\n RANDOM MATRIX \n\n");
for(i=0;i<max;i++)
{
 row_sum[i] = 0;
 printf("\n");
 for(j=0;j<max;j++)
 {
  if(i==0)
   col_sum[j] = 0;
  mat[i][j] = random(10);
  col_sum[j] += mat[i][j];
  row_sum[i] += mat[i][j];
  mat_sum += mat[i][j];
  printf(" %d",mat[i][j]);
 }
}

getch();

printf("\n\n Row Sums");
for(i =0; i<max; i++)
 printf("\n Row %d = %d",i+1,row_sum[i]);

printf("\n\n Column Sums");
for(i =0; i<max; i++)
 printf("\n Column %d = %d",i+1,col_sum[i]);

printf("\n\n Matrix Sum = %d",mat_sum);
getch();
}