Nothing.
The C language only recognizes a few keywords, like "for" and "if". Most of what's in a C program ... that doesn't reference routines in the C program itself ... are library calls, and cputs() is one of those. What it does is write its argument (which should be a pointer to a character string) to the console... console put string.
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...a function call.
C++ is related to C, the language from which it is derived.
Every C plus plus program that is a main program must have the function 'main'.
to locate coordinates ..
Use the C++ getline() function from the standard library.