MATLAB is a commercial mathematics software produced by MathWorks, USA. It is a high-level technical computing language and interactive environment for algorithm development, data visualization, data analysis and numerical calculation. It mainly includes MATLAB and Simulink. MATLAB and MathemaTIca, Maple are also called the three major mathematical software. It is second to none in numerical computing in mathematics applications. MATLAB can perform matrix operations, draw functions and data, implement algorithms, create user interfaces, and connect programs in other programming languages. It is mainly used in engineering calculation, control design, signal processing and communication, image processing, signal detection, and financial modeling design. And other areas such as analysis.
MATLAB features:
Numerical Analysis
Numerical and symbolic calculation
Engineering and scientific drawing
Control system design and simulation
Digital image processing
Digital signal processing
Communication system design and simulation
Finance and financial engineering
MATLAB application:
The MATLAB product family can be used to do the following things:
â—Numerical analysis
â—Value and symbol calculation
â—Engineering and scientific drawing
â—Control system design and simulation
â—Digital image processing technology
â—Application of digital signal processing technology MATLAB in communication system design and simulation
â—Communication system design and simulation
â—Finance and financial engineering
â—Management and scheduling optimization calculation (Operational Research)
MATLAB has a wide range of applications, including signal and image processing, communications, control system design, test and measurement, financial modeling and analysis, and computational biology. Additional toolboxes (a dedicated set of MATLAB functions provided separately) extend the MATLAB environment to address specific types of problems in these application areas. 
Second, C language introduction
C language is a general-purpose computer programming language that is widely used. The C language is designed to provide a programming language that can be easily compiled, processed with low-level memory, generated with a small amount of machine code, and run without any runtime environment support.
Basic features of C language:
1. High-level language: It is a unit of work that combines the basic structure and statements of high-level languages ​​with the practicality of low-level languages.
2. Structured language: The distinguishing feature of structured language is the separation of code and data, that is, the various parts of the program are independent of each other except for the necessary information exchange. This structured approach makes the program hierarchy clear and easy to use, maintain, and debug. The C language is provided to the user as a function. These functions can be easily called, and have a variety of loops, conditional statements to control the flow of the program, so that the program is fully structured.
3, code level cross-platform: due to the existence of standards, almost the same C code can be used for a variety of operating systems, such as Windows, DOS, UNIX, etc.; also applicable to a variety of models. The C language is superior to other high-level languages ​​in the case of writing hardware operations.
4, the use of pointers: you can directly operate close to the hardware, but the pointer operation of C does not protect, it also brings a lot of unsafe factors. C++ has improved in this respect, while retaining the pointer operation while enhancing security, has been supported by some users, but because these improvements increase the complexity of the language, it is also criticized for another part. Java draws on the lessons of C++, cancels the pointer operation, and eliminates some of the controversial aspects of C++ improvements. It has achieved good results in terms of security and suitability, but it itself runs in a virtual machine and runs. The efficiency is lower than C++/C. In general, C, C++, and Java are considered to be the same language, and they have long occupied the top three in the program.
Unique features:
The C language is a procedural language with structured programming, variable scope, and recursive functionality.
The C language passing parameters are passed by value, and a pointer passed by value.
Different variable types can be combined together using structs.
There are only 32 reserved keywords, which make variables and function names more flexible.
Some variable types can be converted, such as integer and character variables.
With the pointer, the C language can easily perform low-level control of the memory.
The precompiler (preprocessor) makes the C language compilation more flexible.
Third, the difference between MATLAB language and C language
The bottom layer of MatLab is written in C. The efficiency of C is higher than that of MatLab, but MatLab syntax is much simpler and simpler, but the execution efficiency is not high. MATLAB is used for specific aspects. For example, matrix operation is very good for DSP. Advantages, and C language is different, the bottom layer of many software is written in C. Matlab provides an interpretation-based language. Although it is also a high-level language, it is still very simple. Its goal is user convenience and simple development. In fact, these conveniences come at a price. The compiler bears these costs and there is a loss in program execution efficiency. Matlab, on the other hand, is also based on its purpose for scientific computing and cannot be applied to general-purpose programming. The c language keeps its compilation speed, is convenient for large-scale programming, and has high execution efficiency, such as os and millions of lines of code. At the same time, the C language does a lot of application environments other than computing, such as logic judgment, I/O operations and other embedded applications, such as the matlab compiler. . . Obviously vector-based computational optimization is a burden for these applications. Of course, there are other reasons. I still want to be incomplete for the time being, but these are enough to explain the difference between the two. In a word, the scope and purpose of the application are different, and the design of the language is of course different.
Matlab is an interpretive language, integrated, designed for mathematical calculations related to mathematics. The numerical operation matlab is very simple and powerful, and it is very convenient to use. For example: The procedure for finding the maximum value of array A is as follows: A=[1 2 3 4 5 6];% assigns a value to A max(A)% to find the maximum value. The C language is troublesome. The multi-C language is the object-oriented basic language. More for the underlying function development, software development, microcontroller control, etc., matlab can do C language can certainly do, but generally have to be more troublesome, and C language can do matlab can not do. The most obvious difference in form is that matlab is compiled one sentence at a time, while c language is compiled for a complete code segment, and c has a header file (#include(..)), but there is no matlab. For the numerical operation matlab is very simple and powerful, c is a bit cumbersome, the algorithm requires c relatively higher.
The main advantage of matlab is the integration of powerful mathematical calculation functions, which can guarantee the calculation accuracy and efficiency of large-scale data. Matlab integrates a lot of mathematical calculation functions, which can be easily called. With c language, you must know that any algorithm needs to be designed and debugged to ensure that the program can be executed correctly.
The advantage of matlab lies in large-scale matrix operations, solving ordinary differential and partial differential equations, including image recognition, artificial intelligence, filtering, etc. It can be said that matlab is a professional mathematical software, an efficient professional tool. In a word, matlab integrates a lot of mathematical computing functions, focusing on the field of mathematical computing, while c language is a more popular program platform.
Matlab is an interpreted script. The c language is the language of compiling and executing. Simply put, the interpreter of matlab is to read the code once, and the compiler of the C language must compile the source file to generate the target code, and then execute the entire target code. The underlying matlab is implemented in C/C++. The .m file can be compiled into an exe file using the mcc command built into matlab.
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