C++ is an object-oriented programming language developed on the basis of C language, which is powerful and enduring. It is often used in systems, engine development, servers, mobile devices, game development and other application fields, and is also the competition language of the information Olympics.
The syntax of C++ is very strict. Each statement must end with a semicolon, and variables must be defined before use. C++ supports many data types, including integer, floating point, character, array, pointer and so on. Among them, integers can be divided into short, int, long and so on, and floating points can be divided into float, double and so on. In addition, C++ also supports structure and union, and can combine a set of variables.
The control structure of C++ includes conditional statement, loop statement and switch statement. Conditional statements use if, else if and else keywords, which can be used to realize logical judgment based on conditions. Loop statements use for, while and do-while keywords, and can be used to repeatedly execute a piece of code. The switch statement uses the switch keyword, and you can choose to execute different code blocks according to the variable value.
Functions of C++
C++ functions can be used to encapsulate a reusable piece of code. Function definition needs to specify the function name, return value type and parameter list, and then implement the specific function in the function body.
Functions can be reused by calling to improve the maintainability and readability of the code. In addition, C++ also supports function overloading and function templates, and can define different function versions according to different requirements.