3Functions
C++ inherits all the C syntax, including the definition and usage of functions. In process-oriented programming (also known as structured programming), function is the basic unit of module division, and an abstract of the problem-solving process. Function is also important in object-oriented programming, in which it is an abstract of functionalities.
To develop or debug a complex system, engineers will usually divide it into several subsystems, and then develop or debug based on these subsystems. Subprograms in high-level program languages are used to realize this kind of module division. In C and C++, subprograms are embodied as functions. We usually abstract functions from independent and frequently used functionality modules. Once ...
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