ECE 1574 Week 1 Program Structure.docx

ECE 1574 Week 1 Program Structure.docx - Structure of a C...

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Structure of a C++ program /* Comments may be used to describe the program’s purpose. This method comments the entire line. */ // This is another way to mark a comment. This method can be used following executable code. #include<iostream> #include<cmath> using namespace std; int main() { // Declare and initialize variables double x1, x2, y1, y2, s1, s2, dist; char pause; Preprocessor directives – tell the compiler to include the contents of these files when it compiles the program. File names that are part of the standard C++ library are enclosed in pointy brackets < >. Any nonstandard or custom files to be invoked by the compiler would have the filename enclosed with quotation marks, like this: #include “Point.h” // note that most header files have an “h” extension. The using directive tells the compiler to use the library filenames declared in the namespace std . A namespace is where C++ declares all its entities so the compiler can interpret the statements in the user’s program.
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