Consider these two function definitions:
void foo() { }
void foo(void) { }
Is there any difference between these two? If not, why is the void
argument there? Aesthetic reasons?
In C:
void foo()
means "a function foo
taking an unspecified number of arguments of unspecified type" void foo(void)
means "a function foo
taking no arguments"In C++:
void foo()
means "a function foo
taking no arguments" void foo(void)
means "a function foo
taking no arguments"By writing foo(void)
, therefore, we achieve the same interpretation across both languages and make our headers multilingual (though we usually need to do some more things to the headers to make them truly cross-language; namely, wrap them in an extern "C"
if we're compiling C++).