Write a structure onto a file

[eurydice]

Hello guys
I've never dealt with files in C language.
I would like to know if the code I wrote is correct. It seems to work but I'm not sure about the syntax.

<code>
FILE *f1;
struct service {
char city[40];
char train_station[40];
};

struct service train_stop;

strcpy(train_stop.city, "1");

entree = fopen("list_cities", "a");

while(strcmp(train_stop.city,"ZZ") != 0)
{
printf("Enter a city (ZZ to end): ");
scanf("%s", train_stop.city);

if(strcmp(train_stop.city,"ZZ") != 0)
{
fprintf(entree, "%s\n", train_stop.city);

printf("Enter the corresponding train station: ");
scanf("%s", train_stop.train_station);
fprintf(entree, "%s\n", train_stop.train_station);
}
}
fclose(f1);
}
</code>

[weaknessforcats]

Files don't know about structs.

I suggest your write each struct member individually and in the case of the arrays write 40 bytes each. That way you can read 40 bytes each back into a struct variable.

If you write 40 bytes plus 40 bytes plus a \n, you will have what is called a flat file. In flat files, each record has the same layout and this makes for easier processing when the file read.

You need to absolutely know the order of the data in the file in order to read that file.