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Incompatible return types

Sorry if this is too simple a question. I'm just really upset.

I am getting the following error when compiling:

sll.c:129: error: incompatible types in return

Here is my structure definition at the top of my file, you might need to understand the function where the error occurs:

struct string_linked_list {
   char *s;
   struct string_linked_list *next;
};

typedef struct string_linked_list SLL;

Here is a function that returns an error. I wrote this function to just build a singleton list for testing purposes.

SLL makeSingleton()
{
    SLL * new= (SLL *) malloc( sizeof(SLL));
    char*sp = strdup("test");
    new->s = sp;
    new->next = NULL;
    return new;
}

Do you have any idea what the problem might be?

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3 answers


function has an implicit return type int and you return SLL * also try to avoid naming variables "new"



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You need to specify your return type:

SLL* makeSingleton()
{

If you don't specify this, in C the default function will return int.



Edit:

Given your new edit, the problem is that you need to make a return type SLL*

, not SLL

:

SLL* makeSingleton()
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In your program, the return type is a pointer and therefore the program trace should be SLL* makeSingleton

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