Array min max help (please)

[Adi Seifert]

I'm trying to accept the input of a matrix, calculate the average of ever row and see what the largest and smallest row average is.
For some reason min works but max doesnt, any ideas?

#include <stdio.h>
 
int main()
{
int matrix[50][50]={{0}};
int i, j, a, b, sum=0, max=0, min=250, class_average, num_classes,class_size;
int avg_array[50];
 
printf("Please Enter the number of classes: ");
scanf("%d",&num_classes);
printf("Please Enter the size of each class: ");
scanf("%d",&class_size);
 
/*input matrix*/
for(i = 0; i < num_classes; ++i){
    for(j = 0; j < class_size; ++j)
        scanf("%d", &matrix[i][j]);
    }
 
/*Go over rows and calculate average*/
for(i=0;i<num_classes;++i)
    {
    for(j=0; j<class_size;++j)
    {
    sum+=matrix[i][j];
    }
    class_average=(sum/class_size);
    avg_array[i]=(class_average);
    }
/*Calculate max*/
for (a=0;a<num_classes;++a)
    {
    if(avg_array[a]>max)
        max=avg_array[a];
    }
printf("Class number %d - you have been chosen to represent us at Brobdingnag!\n",max);
 
/*Calculate min*/
for (b=0;b<num_classes;++b)
    {
    if (avg_array[b]<min)
        min=avg_array[b];
    }
printf("Class number %d - you have been chosen to represent us at Lilliput!\n", min);
 
    return 0;
}

[AndiPersti]

You don't reset sum to 0 in your loop which calculates the average.

Bye, Andreas