The document discusses a C++ programming assignment to create two simple mathematics functions and explain the programs created.
It provides an example C++ "Hello World" program with comments explaining each part, including using return 0 to end the main function, and that code can be written across multiple lines or all on one line with the same meaning.
It also explains that std:: tells the compiler to look in the std namespace for identifiers like cout, while using namespace std dumps the std namespace into the global namespace, allowing cout to be used without the std:: prefix but increasing the risk of name conflicts.
The document discusses a C++ programming assignment to create two simple mathematics functions and explain the programs created.
It provides an example C++ "Hello World" program with comments explaining each part, including using return 0 to end the main function, and that code can be written across multiple lines or all on one line with the same meaning.
It also explains that std:: tells the compiler to look in the std namespace for identifiers like cout, while using namespace std dumps the std namespace into the global namespace, allowing cout to be used without the std:: prefix but increasing the risk of name conflicts.
The document discusses a C++ programming assignment to create two simple mathematics functions and explain the programs created.
It provides an example C++ "Hello World" program with comments explaining each part, including using return 0 to end the main function, and that code can be written across multiple lines or all on one line with the same meaning.
It also explains that std:: tells the compiler to look in the std namespace for identifiers like cout, while using namespace std dumps the std namespace into the global namespace, allowing cout to be used without the std:: prefix but increasing the risk of name conflicts.
The document discusses a C++ programming assignment to create two simple mathematics functions and explain the programs created.
It provides an example C++ "Hello World" program with comments explaining each part, including using return 0 to end the main function, and that code can be written across multiple lines or all on one line with the same meaning.
It also explains that std:: tells the compiler to look in the std namespace for identifiers like cout, while using namespace std dumps the std namespace into the global namespace, allowing cout to be used without the std:: prefix but increasing the risk of name conflicts.
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ASSIGNMENT PROGRAMMING C++
1. Create 2 simple mathematics operator function using C++ programming
language software. A. TAMBAH
B. DARAB
2. Explain pogram c++ that you create (operation).
a) Return 0; The return statement causes the main function to finish. return may be followed by a return code (in our example is followed by the return code 0). A return code of 0 for the main function is generally interpreted as the program worked as expected without any errors during its execution. This is the most usual way to end a C++ console program. You may have noticed that not all the lines of this program perform actions when the code is executed. There were lines containing only comments (those beginning by //). There were lines with directives for the compiler's preprocessor (those beginning by #). Then there were lines that began the declaration of a function (in this case,the main function) and, finally lines with statements (like the insertion into cout), which were all included within the block delimited by the braces ({}) of the main function. The program has been structured in different lines in order to be more readable, but in C++, we do not have strict rules on how to separate instructions in different lines. For example, instead of intmain () { cout<<" Hello World!"; return0; } We could have written: intmain () { cout<<"Hello World!"; return 0; } All in just one line and this would have had exactly the same meaning as the previous code.
b) Std:: "std" a namespace. The "::" operator is the "scope" operator. It tells the compiler which class/namespace to look in for an identifier. So std::cout tells the compiler that you want the "cout" identifier, and that it is in the "std" namespace. If you just said cout then it will only look in the global namespace. Since cout isn't defined in the global namespace, it won't be able to find it, and it will give you an error. using namespace std; tell the compiler "take everything that's in the std namespace and dump it in the global namespace". This allows you to use cout without the std:: prefix, but it increases the probability for name conflicts, since a bunch of extra names that you didn't expect also got added to the global namespace, and that might butt heads with some of your own names.
