max prime in a 2D array bug

[jeraya6]

i have this part of a program code, which purpose is to find max prime num in a 2D array.
it should work fine.. but for some reason it only checks the first row,
so the output will be the max prime of the first row only ?
anyone can see through this ? what's seems to be the prob ?

flag=1;
  for (int i = 0;i < size2;i++) {
for (int j = 0;j <size2;j++) {
for (int k = 2;k < ar[i][j];k++) {
if  (ar[i][j] % k == 0)
{
flag = 0;
}
}
if (flag) {
if (ar[i][j] > max)
max = ar[i][j];
}
}
}
cout << "max prime = " << max<<endl;

[lastchance]

Move the first line down two lines.

[Ultralegendary]

once the flag becomes '0', it remains same.
you need to change it to '1' to search for next prime number.
at line 14, before '}' put

flag =1;

[jeraya6]

@Ultralegendary
thank you , it worked. i get it now :)