Gotcha (programming) - Gotchas in The C Programming Language - Function Calls

Function Calls

Example from C and relatives:

/* File name: fortytwo.c */ #include foo { printf(" 42!n"); } int main { printf("I will here below write '42':n"); foo; printf("I think I wrote '42', but I'm not quite sure...n"); return 0; }

will produce (when compiled and run):

$ ./fortytwo I will here below write '42': I think I wrote '42', but I'm not quite sure...

What foo; expression counterintuitively does is returning the address of the function foo. What the programmer intended was probably instead the function call:

foo;

where the parenthesis indicates a function call with zero arguments.

Read more about this topic:  Gotcha (programming), Gotchas in The C Programming Language

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