Pacenet: getchar() andputchar() in C are functions or macros? and Why?

Wednesday, 22 August 2012 | Unknown at 06:05 |

Most C implementations impose a significant overhead for
each function call. Thus we may want to define things that look like
functions but do not have the function call overhead.
Due to which
getchar() and putchar() are usually implemented as macros to avoid having
to call a function for each character of input or output.