2D array easy q

okay i feel like an idiot asking this question but i just can't seem to get it to work.

How do you output the row number with the largest element in a 2D array?

Ive got the array set up with students and quizzes, and i want to output "the student with the highest score is"<<rownumber;

this is my function for the array-->mark[quiznumber][stud_num]

int r,largest=0;
largest = mark[0][0];
for (int c=0;c<quiznumber;c++)
for (int r=0;r<stud_num;r++)
if (mark[r][c]>largest)
largest=mark[r][c];
cout<<"The student with best quiz mark is student: "<<r<<endl;

it always outputs r as being the value of quiznumber ................. can anyone explain how to do it ???

ok well i thought i figured it out when i did this:

int row=0,largest=0;
largest = mark[0][0];
for (int c=0;c<quiznumber;c++)
for (int r=0;r<stud_num;r++)
if (mark[r][c]>largest)
r=row;
cout<<"The student with best quiz mark is student: "<<row<<endl;

but it still didnt work

in your if() statement, you also need to set "largest" equal to the new largest one.... because this way you initialize "largest" to 0 and only compare everything to it after that....