I'm repeating myself over and over here.
Code:
for(j=0; j<VEERGE; j++)
{
 if (j<1)  printf("%4d", maatriks[i][5]);
}
This makes no sense. You're not using j in the loop other than to test if it's less than 1, which is pointless. The range for j needs to be the columns you want to sum. You really need to understand what arrays are, how you access them and how loops work. You can't leave it till the last minute then guess.