[janitha]

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

int * list2array(void * list);

struct list_el {
int val;
struct list_el * next;
};

typedef struct list_el item;

void main() {
item * curr, * head;

int i;
int n[10];

head = NULL;

for(i=2;i<=10;i++) {
curr = (item *)malloc(sizeof(item));
curr->val = i;
n[i]=curr->val ;
curr->next = head;
head = curr;
}

curr = head;

while(curr) {

for(i=2;i<=10;i++)
{
n[i]=curr->val;
printf("%d\n", n[i]);
curr = curr->next ;
}

}
}


//error i got in linux

array.c:12: error: expected ‘(’ before ‘struct’
array.c: In function ‘main’:
array.c:16: error: ‘item’ undeclared (first use in this function)
array.c:16: error: (Each undeclared identifier is reported only once
array.c:16: error: for each function it appears in.)
array.c:16: error: ‘curr’ undeclared (first use in this function)
array.c:16: error: ‘head’ undeclared (first use in this function)
array.c:24: error: expected expression before ‘)’ token
array.c:27: error: ‘val’ undeclared (first use in this function)

How to correct this pls help me

[jimblumberg]

In the following snippet:

int * list2array(void * list);

Where has list been defined?

Where is list2array() implemented?

Jim

[janitha]

Originally Posted by jimblumberg

In the following snippet:

int * list2array(void * list);

Where has list been defined?

Where is list2array() implemented?

Jim

I remove that line but same error is coming

[salem]

Are you compiling the right file?

$ cat foo.c
#include<stdlib.h>
#include<stdio.h>

int *list2array(void *list);

struct list_el {
  int val;
  struct list_el *next;
};

typedef struct list_el item;

void main()
{
  item *curr, *head;
  int i;
  int n[10];

  head = NULL;
  for (i = 2; i <= 10; i++) {
    curr = (item *) malloc(sizeof(item));
    curr->val = i;
    n[i] = curr->val;
    curr->next = head;
    head = curr;
  }

  curr = head;
  while (curr) {
    for (i = 2; i <= 10; i++) {
      n[i] = curr->val;
      printf("%d\n", n[i]);
      curr = curr->next;
    }
  }
}
$ gcc -Wall -Wextra foo.c
foo.c:13:6: warning: return type of ‘main’ is not ‘int’ [-Wmain]

That's only because you used void main and not int main.
Nothing at all about item being undeclared.

[clifford]

The code you have posted is not the code for which the compiler diagnostics were issued. For starter's in your code line 12 is a blank line; besides that the code compiles fine.