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The articles in this section of the documentation explain diagnostic error and warning messages that are generated by the Microsoft C/C++ compiler and build tools.
Dev c compiling problems hallow: iam newbie in c programming and iam using dev c compiler its work good for me when i write my own code but when i download some source codes from internet and try to compile it it's give me many erorrs so i want to know is this a compiler problem or what? Dec 05, 2019 Intel® C Compiler 19.1 for Windows., PSXE 2020 Release Notes; Intel® Fortran Compiler 19.1 for Windows., PSXE 2020 Release Notes. INTELDEVREDISTcompilerlibmic with redistributable libraries for Intel® Many Integrated Core Architecture(Intel MIC) architecture. And an environment variable MICLDLIBRARYPATH is set to this location. Apr 21, 2017 Microsoft Edge Dev. Getting Started with Visual Studio for C and C Development. A built-in compiler and build system, a top of the line debugger. Mar 07, 2017 Microsoft C Compiler (MSVC) If you are targeting Windows, the Microsoft C compiler (MSVC) may be the way to go. This is the default compiler for most Visual Studio C projects and is recommended if you are targeting Windows. Compiler options for the Microsoft C compiler. You can use the Clang compiler with Visual Studio to target Android, iOS, and Windows. Nov 18, 2013 After downloading and installing the program, you can launch Visual Studio 2013 and switch to use the new compiler in your C projects. We recommend that you create a separate project configuration and modify it for projects that utilize the CTP compiler. Open the 'Build' menu and then select the 'Configuration Manager' option.
Important
The Visual Studio compilers and build tools can report many kinds of errors and warnings. After an error or warning is found, the build tools may make assumptions about code intent and attempt to continue, so that more issues can be reported at the same time. If the tools make the wrong assumption, later errors or warnings may not apply to your project. When you correct issues in your project, always start with the first error or warning that's reported, and rebuild often. One fix may make many subsequent errors go away.
To get help on a particular diagnostic message in Visual Studio, select it in the Output window and press the F1 key. Visual Studio opens the documentation page for that error, if one exists. You can also use the search tool above to find articles about specific errors or warnings. Or, browse the list of errors and warnings by tool and type in the navigation pane on this page.
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Note
Not every Visual Studio error or warning is documented. In many cases, the diagnostic message provides all of the information that's available. If you landed on this page when you used F1 and you think the error or warning message needs additional explanation, let us know. You can use the feedback buttons on this page to raise a documentation issue on GitHub, or a product issue on the Developer Community site. You can also send feedback and enter bugs within the IDE. In Visual Studio, go to the menu bar and choose Help > Send Feedback > Report a Problem, or submit a suggestion by using Help > Send Feedback > Send a Suggestion.
You may find additional assistance for errors and warnings in Microsoft's public forums. Or, search for the error or warning number on the Visual Studio C++ Developer Community site. You can also search for errors and warnings and ask questions on Stack Overflow to find solutions.
For links to additional help and community resources, see Visual C++ Help and Community.
In this section
BSCMAKE errors and warnings (BKxxxx)
Errors and warnings generated by the Microsoft Browse Information Maintenance Utility (BSCMAKE.EXE).
Errors and warnings generated by the Microsoft Browse Information Maintenance Utility (BSCMAKE.EXE).
Command-line errors and warnings
Errors and warnings generated by the build tools for command-line options issues.
Errors and warnings generated by the build tools for command-line options issues.
Compiler fatal errors C999 - C1999
Errors that halt the C++ compiler (CL.EXE).
Errors that halt the C++ compiler (CL.EXE).
Compiler errors C2001 - C3999
Errors detected by the C++ compiler (CL.EXE). Hazel mac cost.
Errors detected by the C++ compiler (CL.EXE). Hazel mac cost.
Compiler warnings C4000 - C5999
Warnings for issues detected by the C++ compiler (CL.EXE).
Warnings for issues detected by the C++ compiler (CL.EXE).
Compiler warnings by compiler version
A list of the warnings introduced by each compiler version.
A list of the warnings introduced by each compiler version.
C Runtime errors (Rxxxx)
Errors generated at runtime by the C Runtime Library (CRT).
Errors generated at runtime by the C Runtime Library (CRT).
CVTRES errors and warnings (CVTxxxx)
Errors and warnings generated by the Microsoft Resource File To COFF Object Conversion Utility (CVTRES.EXE).
Errors and warnings generated by the Microsoft Resource File To COFF Object Conversion Utility (CVTRES.EXE).
Expression evaluator errors (CXXxxxx)
Errors generated by the debugger and diagnostics tools.
Errors generated by the debugger and diagnostics tools.
Linker tools errors and warnings (LNKxxxx)
Errors and warnings generated by the linker and related tools (LINK.EXE, LIB.EXE, DUMPBIN.EXE, EDITBIN.EXE).
Errors and warnings generated by the linker and related tools (LINK.EXE, LIB.EXE, DUMPBIN.EXE, EDITBIN.EXE).
Math errors (Mxxxx)
Errors generated by the runtime floating-point math library.
Errors generated by the runtime floating-point math library.
NMAKE errors and warnings (Uxxxx)
Errors and warnings generated by the Microsoft makefile tool (NMAKE.EXE).
Errors and warnings generated by the Microsoft makefile tool (NMAKE.EXE).
Profile-Guided Optimization errors and warnings (PGxxxx)
Errors and warnings generated by the Profile-Guided Optimization (PGO) tools.
Errors and warnings generated by the Profile-Guided Optimization (PGO) tools.
Project build errors and warnings (PRJxxxx)
Errors and warnings generated by the native C++ Project build system in Visual Studio.
Errors and warnings generated by the native C++ Project build system in Visual Studio.
Resource compiler errors and warnings (RCxxxx, RWxxxx)
Errors and warnings generated by the Resource Compiler (RC.EXE).
Errors and warnings generated by the Resource Compiler (RC.EXE).
Vectorizer and parallelizer messages
Diagnostic messages generated by the vectorizer and parallelizer optimization compiler options.
Diagnostic messages generated by the vectorizer and parallelizer optimization compiler options.
Related sections
See also
C/C++ Building Reference
Debugging in Visual Studio
-->Debugging in Visual Studio
Visual C++ includes a C compiler that you can use to create everything from basic console programs to full Windows Desktop applications, mobile apps, and more.
This walkthrough shows how to create a basic, 'Hello, World'-style C program by using a text editor, and then compile it on the command line. If you'd rather work in C++ on the command line, see Walkthrough: Compiling a Native C++ Program on the Command Line. If you'd like to try the Visual Studio IDE instead of using the command line, see Walkthrough: Working with Projects and Solutions (C++) or Using the Visual Studio IDE for C++ Desktop Development.
Prerequisites
To complete this walkthrough, you must have installed either Visual Studio and the optional Visual C++ components, or the Build Tools for Visual Studio.
Visual Studio is a powerful integrated development environment that supports a full-featured editor, resource managers, debuggers, and compilers for many languages and platforms. For information on these features and how to download and install Visual Studio, including the free Visual Studio Community edition, see Install Visual Studio.
The Build Tools for Visual Studio version of Visual Studio installs only the command-line toolset, the compilers, tools, and libraries you need to build C and C++ programs. It's perfect for build labs or classroom exercises and installs relatively quickly. To install only the command-line toolset, download Build Tools for Visual Studio from the Visual Studio downloads page and run the installer. In the Visual Studio installer, select the C++ build tools workload, and choose Install.
Before you can build a C or C++ program on the command line, you must verify that the tools are installed, and that you can access them from the command line. Visual C++ has complex requirements for the command-line environment to find the tools, headers, and libraries it uses. You can't use Visual C++ in a plain command prompt window without some preparation. You need a developer command prompt window, which is a regular command prompt window that has all the required environment variables set. Fortunately, Visual C++ installs shortcuts for you to launch developer command prompts that have the environment set up for command line builds. Unfortunately, the names of the developer command prompt shortcuts and where they're located are different in almost every version of Visual C++ and on different versions of Windows. Your first walkthrough task is to find the right shortcut to use.
Note
A developer command prompt shortcut automatically sets the correct paths for the compiler and tools, and for any required headers and libraries. Some of these values are different for each build configuration. You must set these environment values yourself if you don't use one of the shortcuts. For more information, see Set the Path and Environment Variables for Command-Line Builds. Because the build environment is complex, we strongly recommend you use a developer command prompt shortcut instead of building your own.
These instructions vary depending on which version of Visual Studio you are using. To see the documentation for your preferred version of Visual Studio, use the Version selector control. It's found at the top of the table of contents on this page.
Open a developer command prompt in Visual Studio 2019
If you have installed Visual Studio 2019 on Windows 10, open the Start menu, and then scroll down and open the Visual Studio 2019 folder (not the Visual Studio 2019 app). Choose Developer Command Prompt for VS 2019 to open the command prompt window.
If you're using a different version of Windows, look in your Start menu or Start page for a Visual Studio tools folder that contains a developer command prompt shortcut. You can also use the Windows search function to search for 'developer command prompt' and choose one that matches your installed version of Visual Studio. Use the shortcut to open the command prompt window.
Dev C++ For Windows 10
Open a developer command prompt in Visual Studio 2017
If you have installed Visual Studio 2017 on Windows 10, open the Start menu, and then scroll down and open the Visual Studio 2017 folder (not the Visual Studio 2017 app). Choose Developer Command Prompt for VS 2017 to open the command prompt window.
If you're running a different version of Windows, look in your Start menu or Start page for a Visual Studio tools folder that contains a developer command prompt shortcut. You can also use the Windows search function to search for 'developer command prompt' and choose one that matches your installed version of Visual Studio. Use the shortcut to open the command prompt window.
Open a developer command prompt in Visual Studio 2015
If you have installed Microsoft Visual C++ Build Tools 2015 on Windows 10, open the Start menu, and then scroll down and open the Visual C++ Build Tools folder. Choose Visual C++ 2015 x86 Native Tools Command Prompt to open the command prompt window.
If you're running a different version of Windows, look in your Start menu or Start page for a Visual Studio tools folder that contains a developer command prompt shortcut. You can also use the Windows search function to search for 'developer command prompt' and choose one that matches your installed version of Visual Studio. Use the shortcut to open the command prompt window.
Next, verify that the Visual C++ developer command prompt is set up correctly. In the command prompt window, enter
cl
and verify that the output looks something like this:There may be differences in the current directory or version numbers, depending on the version of Visual C++ and any updates installed. If the above output is similar to what you see, then you're ready to build C or C++ programs at the command line.
Note
If you get an error such as 'cl' is not recognized as an internal or external command, operable program or batch file,' error C1034, or error LNK1104 when you run the cl command, then either you are not using a developer command prompt, or something is wrong with your installation of Visual C++. You must fix this issue before you can continue.
If you can't find the developer command prompt shortcut, or if you get an error message when you enter
cl
, then your Visual C++ installation may have a problem. If you're using Visual Studio 2017 or later, try reinstalling the Desktop development with C++ workload in the Visual Studio installer. For details, see Install C++ support in Visual Studio. Or, reinstall the Build Tools from the Visual Studio downloads page. Don't go on to the next section until this works. For more information about installing and troubleshooting Visual Studio, see Install Visual Studio.Note
Depending on the version of Windows on the computer and the system security configuration, you might have to right-click to open the shortcut menu for the developer command prompt shortcut and then choose Run as Administrator to successfully build and run the program that you create by following this walkthrough.
Create a C source file and compile it on the command line
- In the developer command prompt window, enter
cd c:
to change the current working directory to the root of your C: drive. Next, entermd c:simple
to create a directory, and then entercd c:simple
to change to that directory. This directory will hold your source file and the compiled program. - Enter
notepad simple.c
at the developer command prompt. In the Notepad alert dialog that pops up, choose Yes to create a new simple.c file in your working directory. - In Notepad, enter the following lines of code:
- On the Notepad menu bar, choose File > Save to save simple.c in your working directory.
- Switch back to the developer command prompt window. Enter
dir
at the command prompt to list the contents of the c:simple directory. You should see the source file simple.c in the directory listing, which looks something like:The dates and other details will differ on your computer. If you don't see your source code file, simple.c, make sure you've changed to the c:simple directory you created, and in Notepad, make sure that you saved your source file in this directory. Also make sure that you saved the source code with a .c file name extension, not a .txt extension. - To compile your program, enter
cl simple.c
at the developer command prompt.You can see the executable program name, simple.exe, in the lines of output information that the compiler displays:NoteIf you get an error such as 'cl' is not recognized as an internal or external command, operable program or batch file,' error C1034, or error LNK1104, your developer command prompt is not set up correctly. For information on how to fix this issue, go back to the Open a developer command prompt section.NoteIf you get a different compiler or linker error or warning, review your source code to correct any errors, then save it and run the compiler again. For information about specific errors, use the search box at the top of this page to look for the error number. - To run your program, enter
simple
at the command prompt.The program displays this text and then exits:Congratulations, you've compiled and run a C program by using the command line.
Next steps
This 'Hello, World' example is about as simple as a C program can get. Real world programs have header files and more source files, link in libraries, and do useful work.
You can use the steps in this walkthrough to build your own C code instead of typing the sample code shown. You can also build many C code sample programs that you find elsewhere. To compile a program that has additional source code files, enter them all on the command line, like:
Microsoft C++ Compiler Free
cl file1.c file2.c file3.c
The compiler outputs a program called file1.exe. To change the name to program1.exe, add an /out linker option:
cl file1.c file2.c file3.c /link /out:program1.exe
And to catch more programming mistakes automatically, we recommend you compile by using either the /W3 or /W4 warning level option:
cl /W4 file1.c file2.c file3.c /link /out:program1.exe
The compiler, cl.exe, has many more options you can apply to build, optimize, debug, and analyze your code. For a quick list, enter
cl /?
at the developer command prompt. You can also compile and link separately and apply linker options in more complex build scenarios. For more information on compiler and linker options and usage, see C/C++ Building Reference.You can use NMAKE and makefiles, or MSBuild and project files to configure and build more complex projects on the command line. For more information on using these tools, see NMAKE Reference and MSBuild.
The C and C++ languages are similar, but not the same. The Microsoft C/C++ compiler (MSVC) uses a simple rule to determine which language to use when it compiles your code. By default, the MSVC compiler treats all files that end in .c as C source code, and all files that end in .cpp as C++ source code. To force the compiler to treat all files as C non-dependent of file name extension, use the /Tc compiler option.
MSVC is compatible with the ISO C99 standard, but not strictly compliant. In most cases, portable C code will compile and run as expected. Visual C++ doesn't support most of the changes in ISO C11. Certain library functions and POSIX function names are deprecated by MSVC. The functions are supported, but the preferred names have changed. For more information, see Security Features in the CRT and Compiler Warning (level 3) C4996.
See also
Walkthrough: Creating a Standard C++ Program (C++)
C Language Reference
Projects and build systems
Compatibility
C Language Reference
Projects and build systems
Compatibility