Problem with Lists

[manutdfan]

I have been set a task to read an input using getchar() and then storing this in a list using calloc() to assign the memory space for it.

The thing is each new character needs to be put at the head of the list. I have tried to create some code to do this but am encountering a problem, as I seem to be transferring a parameter between two functions that is a different data type.

I am getting an "incompatible type for argument '1' of insertitem" error from the compiler which I presume points to the first item being different type to that in the function insertitem.

The thing is that in my teaching class I have been taught to construct the functions for inserting into the list and adding new items to the head of a list like this. Which has confused me as they don't seem to work together, Have I been taught wrong?

The relevant parts of code are highlighted.

#include <stdio.h>
#include <stdlib.h>

typedef struct L{
        int x;
        struct L *next;
}list;

typedef struct {
        list *head;
        list *tail;
} fulllist;

list *insertlist(int hd, list *t1){
     list *t = calloc(1,sizeof(list));
     t->x = hd;
     t->next = t1;
     return t;
}

fulllist insertitem(fulllist a, int b){
         
         if (a.head == NULL){
                    a.head = a.tail = insertlist(b, NULL);
                    }
         else{
                    a.head = insertlist(b, a.head);
                    }
         return a;
}

list *mainlist(){
     list *h = NULL;
     int i = getchar();
     while (i != '.'){
           h = insertitem(h,i);
           }
     return h;
     }

int main(){
    list *z = mainlist();
    return 0;
}

[ssharish2005]

heyy man, this code required too many changes. it looks like u haven't understood the proper usage of list (linked list) and stuff. I would suggest u have a look at some tutorials and get back to coding. Mean time did u look at the error messages given by the compiler.

ssharish2005

[manutdfan]

Yeh I did try with the error messages but it didn't really help.

I thought I understood it but obviously not, i'll go back over the lecture notes I have got and through my textbook and give it another try.