Malloc and structs in C are giving me errors (following a tutorial)?

Question

So I'm following a tutorial on C and I'm stuck at structs since they use the malloc function and that function doesn't seem to go well with my compiler (Visual Studio C++ 10.0). So I followed the instructions exactly and I can compile C except that in this particular code, it gives me an error (code taken literally from the tutorial website): ``` #include #include struct node { int x; struct node *next; }; int main() { /* This won't change, or we would lose the list in memory */ struct node *root; /* This will point to each node as it traverses the list */ struct node *conductor; root = malloc( sizeof(struct node) ); root->next = 0; root->x = 12; conductor = root; if ( conductor != 0 ) { while ( conductor->next != 0) { conductor = conductor->next; } } /* Creates a node at the end of the list */ conductor->next = malloc( sizeof(struct node) ); conductor = conductor->next; if ( conductor == 0 ) { printf( "Out of memory" ); return 0; } /* initialize the new memory */…

Accepted Answer

The problem is that you're compiling C code with a C++ compiler. C allows that conversion from `void *` to an object pointer; C++ doesn't.

You say that you added a cast, but didn't show us what it looked like. If it looks like this, then the code should compile as both C and C++:

```
root = (struct node *) malloc(sizeof (struct node));
```

Alternatively, there might be a way to tell the compiler to treat it as C, but I don't know enough about that compiler to help you there.

Malloc and structs in C are giving me errors (following a tutorial)?

Solution

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