Thread: Need help with a project

What's wrong with this function? It compiles but it doesnt print anything.

EDIT: Or whatever, I'll just put the whole function, so you can see declaration and everything:

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX 4


struct data {
    char name[20];
    char surename[20];
};
struct student {
    struct data data_s;
    float average;
    int grades[10];
};
int grades_f(const struct student* grades_in);


int main(int argc, char* argv[])
{


    struct student students[MAX];
    int grades_f(students);
    int counter = 0;
    printf("Name of the first student: ");
    gets(students[counter].data_s.name);
    while (counter < MAX) {
        printf("Student's surename: ");
        gets(students[counter++].data_s.surename);
        if (counter < MAX) {
            printf("Name of the next student: ");
            gets(students[counter].data_s.name);
        }
    }


    int grades_f(const struct student* grades_in)
    {
        int i;
        for (i = 0; i < MAX; i++, grades_in++) {
            printf("Grades of student: %d", i + 1);
            scanf("%f", grades_in->grades);
        }
    }
    system("PAUSE");
    return 0;
}