fputchar和putchar有什么区别?该如何解决

fputchar和putchar有什么区别?
fputchar和putchar有什么区别?

[解决办法]
fputchar
Portability.
Not defined in ANSI-C but supported in most compilers within stdio.h. 


putchar 
Portability.
Defined in ANSI-C. K&R compatible.