#include <stdio.h>
#include <string.h>
#define SIZE 5
typedef struct
{
    char name[SIZE];
    int id;
    float avg;
}student_t;

int writeStudent(student_t arr[], int size, char namefile[])
{
        strcat(namefile,".bin");
        FILE* p = fopen(namefile, "wb+");
        int status = fwrite(arr, sizeof(student_t), size, p);
        fclose(p);
        return status;

}

int main(int argc, char **argv)
{
    char str[] = "nameoffile";
   student_t arr[] = { {"failure", 1234, 55.4}, {"loserp3", 4321, 80} , {"efs" , 5678, 99.9} };
   if (writeStudent(arr,3,str )==3)
        printf("operation successfully\n");

    getchar();

}