fwrite() and fread() struct array writes nothing in file in C - c

Question

Im having a hard time inputting the data to the file, whenever I input data to struct array then saves it to text file, fwrite() prints nothing to the file.
int last;
struct Person{
int pid;
char lname[MAXchar], fname[MAXchar], mname[MAXchar];
int age;
char subject[MAXchar];
float grade;
};
struct Person Num[MAX];
struct Person *No;
and this is how I save it to the text file.
void saveDATA(){
FILE *fp;
fp=fopen("database.txt","ab");
fwrite(No, sizeof(struct Person), 1, fp);
if(fwrite != 0)
printf("Success!\n");
else
printf("error!\n");
fclose(fp);
}
Although the program says it returns, fwrite doesnt print any data at the text file
and this is how I load the data to return it to the struct array but its not working
void loadDATA(){
FILE *fp;
char line[500];
fp=fopen("database.dbf","rb+");
if(fp == NULL){
fp = fopen("database.dbf", "wb");
}
while (fgets(line, sizeof(line), fp)){
last++;
fscanf(line,"%d %s %s %s %d %s %2.f", &array[last].pid, array[last].lname, array[last].fname,array[last].mname, &array[last].age, array[last].subject, &array[last].grade);
insert(array.tempID, array.L, array.F, array.M, array.TempAge, array.Sub, array.Tempgrade);
}
fclose(fp);
}