Using structs and arrays in c - c

Question

This here is a small portion of a larger program I need to create to enter songs and their info into a database. I am new to using structs and my professor hasnt showed us yet on how to pass structs into functions and then using those inside main. I am also not supposed to use pointers yet. I get many errors when compiling and I'm not sure where to start.
#include <stdio.h>
typedef struct mp3song_struct {
char title[40];
char artist1[20];
char artist2[20];
char artist3[20];
int datemonth;
int dateday;
int dateyear;
char genre[10];
}mp3song;
void populate(mp3song totalsongs[30]);
int main() {
struct mp3song totalsongs[30];
populate(mp3song totalsongs);
}
void populate(mp3song totalsongs[30]){
int i = 0;
for(i = 0; i < 5; ++i){
printf("Enter song title: \n");
scanf("%c", &totalsongs[i].title);
printf("Enter Artists(If no more than 1 enter \"none\")");
printf("Enter artist: \n");
scanf("%c", &totalsongs[i].artist1);
printf("Enter artist: \n");
scanf("%c", &totalsongs[i].artist2);
printf("Enter artist: \n");
scanf("%c", &totalsongs[i].artist3);
printf("Ente date mm/dd/yyyy\n");
printf("Enter month: \n");
scanf("%d", &totalsongs[i].datemonth);
printf("Enter day: \n");
scanf("%d", &totalsongs[i].dateday);
printf("Enter year: \n");
scanf("%d", &totalsongs[i].dateyear);
printf("Enter genre: \n");
scanf("%c", &totalsongs[i].genre);
}
}

Answer 1

There are several problems in your code. You can declare int populate(struct mp3song, struct mp3song totalsongs[30]); as void populate(struct mp3song, struct mp3song totalsongs[30]); since you are not returning an integer.
mp3song is not an array so it cannot be subscripted like &mp3song[i]. In fact populate function cannot receive struct mp3song as it is a type not value. So modify populate function line int populate(struct mp3song totalsongs[30]); and then replace all occurances of &mp3song[i] with &totalsongs[i] and you will be able to take input in the array.

Answer 2

mp3song is a structure name not structure variable
you need to declare a variable of that structure type to pass a structure.
example:
struct definition
struct <struct_name>{
Struct elements;
}<struct variable>;
struct <struct_name> <struct_variable>;
In your case
you can pass only variable not struct_name
struct mp3song totalsongs[30];
populate(totalsongs[30]);
function definition
<return_type int or void> populate(struct mp3song totalsongs[30]);
Now you can access structure elements with variable name totalsongs inside the function.
modifed code of yours
#include <stdio.h>
typedef struct mp3song {
char title[40];
char artist1[20];
char artist2[20];
char artist3[20];
int datemonth;
int dateday;
int dateyear;
char genre[10];
};
void populate(struct mp3song totalsongs[30]);
int main() {
struct mp3song totalsongs[30];
populate(totalsongs);
}
void populate(struct mp3song totalsongs[30]){
int i = 0;
for(i = 0; i < 5; ++i){
printf("Enter song title: \n");
scanf("%s", &totalsongs[i].title);
printf("Enter Artists(If no more than 1 enter \"none\")");
printf("Enter artist: \n");
printf("TITLE: : %s \n",totalsongs[i].title);
scanf("%c", &totalsongs[i].artist1);
printf("Enter artist: \n");
scanf("%c", &totalsongs[i].artist2);
printf("Enter artist: \n");
scanf("%c", &totalsongs[i].artist3);
printf("Ente date mm/dd/yyyy\n");
printf("Enter month: \n");
scanf("%d", &totalsongs[i].datemonth);
printf("Enter day: \n");
scanf("%d", &totalsongs[i].dateday);
printf("Enter year: \n");
scanf("%d", &totalsongs[i].dateyear);
printf("Enter genre: \n");
scanf("%c", &totalsongs[i].genre);
}
}