ANSI C - Clearing a string

Question

I've got a string declared like this: ``` str=malloc(sizeof(char)*128); ``` I want to clear it completely so that whenI do `strncat()` operation, the new characters will be written to the beginning of `str`. The reason I need to clear it is that I'm writing over it with a simplified version of itself (deleting excess whitespace).

Accepted Answer

I suggest you simply do this:

```
*str = '\0';
```

You don't need to clear the entire contents of the buffer. You can just set the first `char` to zero and then you have the empty string.

ANSI C - Clearing a string

Solution

Problem