How do you convert void pointer to char pointer in C

问题

Ok this has been become sooo confusing to me. I just don't know what is wrong with this assignment:

void *pa; void *pb;
char *ptemp; char *ptemp2; 

ptemp = (char *)pa;
ptemp2 = (char *)pb;

Can anyone tell me why I'm getting this error:

error: invalid conversion from ‘void*’ to ‘char*’

回答1:

Actually, there must be something wrong with your compiler(or you haven't told the full story). It is perfectly legal to cast a void* to char*. Furthermore, the conversion is implicit in C (unlike C++), that is, the following should compile as well

 char* pChar;
 void* pVoid;
 pChar = (char*)pVoid; //OK in both C and C++
 pChar = pVoid;        //OK in C, convertion is implicit

回答2:

I just tried your code in a module called temp.c. I added a function called f1.

void *pa; void *pb;
char *ptemp; char *ptemp2;

f1()
{
        ptemp = (char *)pa;
        ptemp2 = (char *)pb;
}

On Linux I entered gcc -c temp.c, and this compiled with no errors or warnings.

On which OS are you trying this?

来源：https://stackoverflow.com/questions/7067927/how-do-you-convert-void-pointer-to-char-pointer-in-c