Can a C function have character return type? AND if so why "getch()" has "int" return type not "char"?

Question

I know a function in C can have void,int or float return types.But can it have "char" return type? If not,then if we return a character, for example return('*') then is the ASCII value of the character returned?And also, if not, then is the ASCII of the character accepted by getch() returned as an integer or it returns something else?I mean, does it return 0 or 1 as error-free or non error-free execution of getch()?

And if a function in C can have char return type, then how come getch() has integer return type?

Answer 1

When you get right down to it, a char variable type IS an int type...just one using a single byte of storage and with the domain of allowable values severely limited.

Answer 2

You can return a char from a function, but chars are always promoted to ints in expressions. So returning a char is pretty much the same as returning an int.



While most implementations of getch() will have no special return values, it belongs to a family that will return special values for end-of-file and error conditions. These values are normally negative impossible char values.



[Also I suspect the getch() your using is not returning ASCII, it is much more likely to be returning UTF-8 or ANSI (which in turn is a misnomer for ISO 8859 extensions). This matters if people are likely to type things like # which is not in every ASCII version or € which I believe is not in any.]

Answer 3

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