Why do you need a function?
Likewise, the main function in a C++ program controls the highest
level of logical steps which solve a problem. The main function
does not contain too much of the detailed work - all the details
are relegated to other separate functions which the main function
calls upon when they are needed.
When a C++ function is called, the statements in the called function
are executed. When the function is finished, control returns to
the place from which it was called, and the program continues.
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