Question

I am pretty new to C.

I am getting this error:

incompatible implicit declaration of built-in function ‘malloc’

Even when I fix the code based on the answers to include <stdlib.h>, I still get:

two or more data types in declaration specifiers

When trying to do this:

struct tnode
{
    int data;
    struct tnode * left;
    struct tnode * right;
}

struct tnode * talloc(int data){
    struct tnode * newTnode;
    newTnode = (struct tnode *) malloc (sizeof(struct tnode));
    newTnode->data = data;
    newTnode->left = NULL;
    newTnode->right = NULL;
    return newTnode;
}

How do I fix it?

Answer 1

You have to put ; behind the struct declaration:

struct tnode
{
    int data;

    struct tnode * left;
    struct tnode * right;
}; // <-- here