Question

I’m new to C and trying to compile this simple code, but it’s not working and I’m not sure why. Can anyone help me?

int main(int argc, const char * argv[])
{
    struct Node{
        int value;
        struct Node *next;
    };

    struct Node* x;
    struct Node* y;
    struct Node* z;

    x = malloc(sizeof(Node));
    y = malloc(sizeof(Node));
    z = malloc(sizeof(Node));

    return 0;        
}

The compiler is complaining about the use of an undeclared identifier ‘Node’:

x = malloc(sizeof(Node));
y = malloc(sizeof(Node));
z = malloc(sizeof(Node));

Answer 1

Try sizeof(struct Node) instead.