Have macro 'return' a value

Question

I\'m using a macro and I think it works fine -

#define CStrNullLastNL(str) {char* nl=strrchr(str,\'\\n\'); if(nl){*nl=0;}}

So it works to zero out the last

Answer 1

#define CStrNullLastNL(str) ({ \
    char* nl=strrchr(str,'\n');\
    if(nl){*nl=0;} \
    nl; \
})

should work.

Edit: ... in GCC.