VC or C can be used by functions to communicate with computers on computers

C is very powerful, so this little thing is trivial.

The upper computer is programmed with VB, and the free port communication of S7-200PLC is very convenient and economical

If I don't have much programming experience in either language, I feel like it's pretty much the same

C is a little simpler, and if your host computer program needs a more beautiful and complex interface, it is easier to implement with C. But considering that you are writing a host computer program, you may need to connect with a single-chip microcomputer or the like, at this time, if you want to have a more subtle control of the bottom layer, it may be more appropriate to use C++.

Then there is the platform problem, C is only suitable for the upper computer Windows platform. C++ is fine.

So it still depends on the specific needs. Write a simple language, it's pretty much the same. I don't know what the landlord is talking about the upper computer tutorial?,Is it referring to the tutorial of ordinary desktop programming?,There is a lot of information on the Internet.。

Are you sure you want to use c to write the upper computer with c, it is recommended to use labwindow cvi oh, dear.

Tutorial Gong Jianwei VC++ Serial Communication Programming C++ MFC Basic Entry Level Can Be Engaged.

If you don't need an interface, use C++

If you require an interface, use C (simpler, WPF is more cool), but depending on your situation, it is better to use C++, C is not difficult, but it is also time-consuming for you to understand the commonly used APIs.

However, it is not recommended to use C language, and once the application software is written in C, the logic will be very confusing, and it is easy to have all kinds of problems.

And if you just want to write a small software that runs on the computer to accept data from the serial port, it is recommended to use VB or VC, there are ready-made MSCOMM controls to use, you can refer to the following two articles:

Written casually, tested for normal use, needed. Environment, single-chip microcomputer sends 9600 baud rate, 8-bit data bit, 1-bit stop bit, no parity, single-chip microcomputer sends a value of 133 will trigger the alarm. You tried to improve something, and when I was free, I will change it for you.

Its main processes are:

Define the serial port - clear the cache - read and write the serial port - close and release the serial port.

Handsome guy,Is your host computer communication software done?,Ask for advice,

Function: Obtain the current user account.

API prototype:

bool getusername( lptstr lpbuffer, name buffer buffer, which stores the username. lpdword nsize size of name buffer returns the username size. );

#include

#include

#include

#include

usingnamespace std;

string getusername()

int main()

Use the extension when adding the source file. c is fine. Or you can put it manually. The source file of the cpp was renamed to. c。

The source file extension created by VC++ by default is. cpp, the compiler compiles in C++. And if the extension is.

C, it will be compiled in C. Compiling according to C is not a simple matter of removing C++ classes, templates and other syntax, C language-specific and other rules such as compound literal are only available. c file.

C and C++ are the same, you can create a new text document and change the suffix to ".".c" or "CPP", which is a suffix for C++ programs, but it's okay. Finally, you can write C by opening it with vc++.

You can also click on the vc++ file from the vc++ midpoint - new, pop up a window, if you don't build a project, click on the pop-up file, then select the c++ soure file from it, and then name ok.

Open "File" - "New", select "Win32 CA" in "Project", enter the project name, "OK"; Then "File"--New", select "File"--C C++ HF", enter the file name, and OK. When you're done, f7--ctrl+f5.

Find a related book, and it is best to follow the tutorial for a period of time to learn the basic operations first.

After clicking the text icon on the toolbar, a new text document will be created, and then click Save, pay attention to it when saving, and deaffix the name of the file. txt to. c is fine. Then you can write the C program in the document.

1.Method for creating a new C source program:

file-c++source file, note that the specified file name suffix is. c, the system defaults to the C++ source program file. cpp

2.Compilation of the program: CTRL+F7

3.Program adaptation: CTRL+F5

The specific instructions are in the build tool.

The compilation is: compile, the tuning is: debug, and the execution is: execute,

If you haven't used it, it's a bit unlikely to talk about it here. Oh, find a book, or an e-book to take a look at VC programming.

The interface is very user-friendly, you can just open it and look at it.