Generally, a variable flag is set in C language, which is a variable and represents judgment in the form of symbols. C language is a process-oriented, abstract and universal programming language, which is widely used in the underlying development. C language has the characteristics of high efficiency, flexibility, rich functions, strong expressive force and high portability, and is favored in programming.
C language compilers are ubiquitous in various operating systems, and their design also affects programming languages such as Java and Python. C language is a process-oriented computer programming language, which is different from object-oriented programming languages such as C++ and Java. The design goal of C language is to provide a programming language that can compile and process low-level memory in a simple way, only generate a small amount of machine code, and does not need any running environment support at runtime.
Introduction to development
The first generation language is machine language and assembly language closely related to machine hardware. The electronic computer has been used since it appeared. Because it corresponds to hardware operation, its language type is almost the same as that of computer. The second generation languages, including FORTRAN and BASIC, were mainly used in various calculations, and appeared in the late 1950s and early 1960s. These languages are not only easy for people to learn and use, but also have a large number of mature program libraries.
Therefore, it is widely used and actually becomes the foundation and predecessor of modern or third-generation programming languages. The third generation language directly supports structured components and has strong processing ability and data structure ability, including structured languages and object-oriented languages, such as structured programming languages such as C, and object-oriented languages such as C++ and Java. It can be roughly divided into general high-level languages, object-oriented languages and specialized languages.