typedef struct database{
    char fullname[50];      //Full names
    int addr;       // The address
    float salary;   // Salaries
    int id;     // Employees' ID numbers
    int noEmpl; // Number of emlployees
} database;

typedef struct database *db;
db construct_db(void);
int main(void)
{
    database *employee[80];
    for(int index=0;index<80;index++)
    {
        employee[index]=construct_db();
    }
    /* your code here */
    return 0;
}
db construct_db(void)
{
    db ret=calloc(1,sizeof(database));
    if(ret==NULL)
    {
        fprintf(stderr,"Error: Calloc returns NULL in construct_db.\n");
        exit(EXIT_FAILURE);
    }
    return ret;
}