ANY wrong to C Code ?#Sequential File Access in C Programming

Question

#include<stdio.h>
#include<string.h>
typedef struct
{
char nim[10];
char nama[100];
char nilai[2];
}
nilaimatkul;
main()
{
nilaimatkul rekaman;
FILE *arsipmatkul;
arsipmatkul = fopen("arsipmatkul.dat","w");
printf("tuliskan rekaman satu per satu:\n");
printf("input nim:\n");
scanf("%s",&rekaman.nim);
while(strcmp(rekaman.nim,"XXXXXX")!=0)
{
/* proses */
printf("input nama:\n");
scanf("%s",&rekaman.nama);
printf("input nilai:\n");
scanf("%s",&rekaman.nilai);
fprintf(arsipmatkul,"%s %s %s\n",rekaman.nim, rekaman.nama, rekaman.nilai);
/* iterasi */
printf("input nim:\n");
scanf("%s", &rekaman.nim);
}
fprintf(arsipmatkul, "%s %s %s\n", "XXXXXX", "XXXX", "x");
fclose(arsipmatkul);
return 0;
}

Answer 1

I don't analyze the program's logic, but if you return "0", then the " main" function needs to return the "int" type:
int main() {
...
return 0;
}