27.2.1: C++ Examples
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Overview
C++ is a general-purpose programming language. It has imperative, object-oriented and generic programming features, while also providing facilities for low-level memory manipulation. C++ was developed by Bjarne Stroustrup at Bell Labs starting in 1979 as an extension of the C language. The C++ programming language was initially standardized in 1998. [1]
C++ is one of the most popular current programming languages [2] and is often used in computer science courses.
Example
Hello World
// This program displays "Hello world!" // // References: // http://www.cplusplus.com/doc/tutorial/program_structure/ #include <iostream> int main() { std::cout << "Hello world!"; }
Output
Hello world!
Discussion
Each code element represents: [3]
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//
begins a comment -
#include <iostream>
includes standard input and output streams -
int main()
begins the main function, which returns an integer value -
{
begins a block of code -
std::cout
is standard output -
<<
directs the next element to standard output -
"Hello world!"
is the literal string to be displayed -
;
ends each line of C++ code -
}
ends a block of code
C++ IDEs
There are many free cloud-based and local IDEs available to begin coding in C++. Check with your instructor or do your own research for recommendations.
Local IDEs
- Code::Blocks
- Dev-C++
- Microsoft Visual Studio
References
- Wikiversity: Computer Programming
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Wikipedia: C++
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TIOBE: Index
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Wikibooks: Programming Fundamentals/Hello World
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