C language is a language with low-level language characteristics

What kind of language is the c language with the characteristics of a low-level language?

C language is a high-level language with the characteristics of low-level languages.

C language has the characteristics of low-level languages:

1. Because C language has pointers, it allows direct access to physical addresses and can directly operate the hardware. This is not available in other high-level languages.

2, can operate on bits, bytes and addresses like assembly language.

Recommended learning: c language video tutorial

Main features

C language is a structured language with clear layers , the program can be written in the form of modules, which is very conducive to program debugging, and the processing and performance capabilities of the C language are very powerful. Relying on very comprehensive operators and diverse data types, various data structures can be easily completed The construction of pointer type can directly address memory and directly operate hardware, so it can be used to develop system programs and application software. Through research and analysis of C language, its main characteristics are summarized as follows:

(1) Concise language

C language contains only 9 kinds of various control statements, and there are only 32, the program writing requirements are not strict and mainly use lowercase letters, and many unnecessary parts are streamlined. In fact, the composition of statements is rarely related to hardware, and the C language itself does not provide hardware-related input, output, file management and other functions. If such functions are needed, programming needs to be done with various libraries supported by the compilation system. , so the C language has a very simple compilation system.

(2) Structured control statements

C language is a structured language, and the control statements provided have structured features, such as for statements, if⋯else statements and switch Statements etc. It can be used to implement logical control of functions and facilitate process-oriented programming.

(3) Rich data types

C language contains a wide range of data types, including not only traditional character types, integer types, floating point types, array types and other data types, but also Among the data types that other programming languages ​​do not have, pointer type data is the most flexible to use, and various data structures can be calculated through programming.

(4) Rich operators

C language contains 34 operators. It treats assignments, parentheses, etc. as operators to operate, making the expression types and operations of C programs The character types are very rich.

(5) Direct manipulation of physical addresses

C language allows direct reading and writing of hardware memory addresses, so that the main functions of assembly language can be realized and the hardware can be directly operated. C language not only has the good characteristics of high-level languages, but also contains many advantages of low-level languages, so it is widely used in the field of system software programming.

(6) The code has good portability

C language is a process-oriented programming language. Users only need to focus on the problem being solved without spending too much time. Focus on understanding the relevant hardware, and for different hardware environments, the code when using C language to implement the same function is basically the same, and the transplant can be completed without or only a small amount of changes. This means that for a computer written C programs can be easily run on another computer, thus greatly reducing the work intensity of program transplantation.

(7) Can generate high-quality, high-efficiency target code execution programs

Compared with other high-level languages, C language can generate high-quality and high-efficiency target code, so it is commonly used It is suitable for writing embedded system programs that require high code quality and execution efficiency.

Unique Features

C language is the most universal computer programming language. It can not only exert the functions of high-level programming languages, but also has the advantages of assembly language, so it is relatively Compared with other programming languages, it has its own unique characteristics. Specifically reflected in the following three aspects:

First, extensiveness. The size of the operation range of C language directly determines its advantages and disadvantages. The C language contains 34 operators, so the range of operations exceeds that of many other languages. In addition, the expression forms of its operation results are also very rich. In addition, the C language includes various data structure forms such as character type and pointer type. Therefore, it can also handle larger data structure operations.

Second, simplicity. 9 types of control statements and 32 KEYWORDS are the basic features of C language, which make it widely applicable in computer application writing. It can not only be suitable for the operations of programmers and improve their work efficiency, but also support advanced Programming avoids the tediousness of language switching.

Third, the structure is perfect. C language is a structured language that can implement modular applications by forming module units. It has significant advantages in system description. At the same time, this feature also enables it to adapt to a variety of different programming requirements and execute efficient.

shortcoming

1. The shortcomings of C language are mainly reflected in the encapsulation of data, which makes C have great flaws in data security. This is also a major difference between C and C.

2. The syntax restrictions of C language are not too strict, and the type constraints of variables are not strict, which affects the security of the program. There is no check for out-of-bounds array subscripts, etc. From an application perspective, C language is more difficult to master than other high-level languages. In other words, people who use C language are required to be more proficient in programming.

The above is the detailed content of C language is a language with low-level language characteristics. For more information, please follow other related articles on the PHP Chinese website!