Is this function call valid in C

Question

char* p = init();
p = foo(p);        /* this one */

function prototype foo

:

char* foo(char* p);

Is it legal to call foo

this way or does it fall into the Undefined Behavior category ?

+3

Bite Bytes 07 jul. 17 at 21:29

2 answers

Is foo valid to call this way or does it fall into the Undefined Behavior category?

Yes , order is guaranteed (there is a sequence point between parameter evaluation and function call).

You are probably confusing this with the side effects of unnatural modifications or something else.

+6

gsamaras 07 jul. 17 at 21:31

John bode · Accepted Answer · 2017-07-07T21:37:37+0000

Yes, it's well defined - there is a sequence point between evaluating function arguments and calling the function.