This is c++
This is one of the practice questions I am faced with :

Fill in the blank, so that this code sums only the high temperature!
// 0 is high, 1 is low
the problem is sum=0;
for (k=0; k<50; k++)
for (j=0; j<7; j++)
sum= sum + _______________

My answer is sum= sum+j++,and J++
I have been told this is incorrect
I have been looking at this code and I do not see enough information to answer this question There aren't any real temps. Please tell me what you think