Help with C structures

[J-Camz]

I just learned about c structures the other day but I can't seem to get them to work. It give the wrong result at the end.
The errors I'm getting are:
In function `main':
24 [Warning] comparison between pointer and integer
26 [Warning] assignment makes integer from pointer without a cast
27 [Warning] passing arg 1 of `strcpy' from incompatible pointer type
29 assignment makes integer from pointer without a cast

# include <stdio.h>
# include <stdlib.h>
# include <string.h>
struct student
{
       char name [50];
       char id [50];
       char score [50];
};

int main ()
{
    int i;
    char sum=0, high=0,avg, highest[50][50];
    struct student stu[i];
    for (i=0; i<=4; i++)
    {
        printf ("Enter the student's name.");
        scanf ("%s", &stu[i].name);
        printf ("Enter the student's ID.");
        scanf ("%s", &stu[i].id);
        printf ("Enter the student's score.");
        scanf ("%f", &stu[i].score);
        if (stu[i].score>high)
        {
           high = stu[i].score;
           strcpy (highest,stu[i].name);
        }
        sum = sum + stu[i].score;
    }
    avg = sum/5;
    printf ("Student %s got the highest grade of %f", highest, high); 
    system ("pause");
    return 0;
}

[WingedPanther]

Line 24: you are attempting to compare a pointer to the first element of a char score[50] with a char high.

The other errors (I didn't check all of them) appear to be related. Why isn't score, high, sum, and avg an int?

[J-Camz]

Thanks for replying but I figured out the problem