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The structure of a C++ program
A comment istext that is ignored by the compiler but which nonetheless conveys information to other programmers. A comment consists of text enclosed between the markers /* and */ and may continue over several lines.
The lines beginning with #include such as
indicate that the compiler should read in definitions from a header file. The inclusion of a header file indicates that the program uses facilities from a library, which is a collection of prewritten tools that perform a set of useful operations.
Program-level definitions const type name = value ; constint LOWER_LIMIT = 0; constint UPPER_LIMIT = 12;
A function is a unit of code that (1) performs a specific operation and (2) is identified by name. intRaiseIntToPower(int n, int k); is an example of a function prototype, a declaration that tells the compiler the information it needs to know about a function to generate the proper code when that function is invoked.
The main program
Every C++ program must contain a function with the name main. This function specifies the starting point for the computation and is called when the program starts up. When main has finished its work and returns, execution of the program ends.
The next line in the body of RaiseIntToPoweris
result = 1;
This statement is a simple example of an assignment statement, which sets the variable on the left of the equal sign to the value of the expression on the right.
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