Looking for a C or C++ compiler for Windows that just works?
Windows does not ship with a C or C++ compiler, and the usual advice for getting one is a chore: download MinGW or a GCC build, add its bin folder to PATH, open a terminal, and type gcc commands by hand. C and C++ IDE skips every step. Clang from the llvm-mingw toolchain, with the Windows headers and runtime it needs, is packaged inside the app, so the first program you write compiles without installing anything else.
The editor and the compiler live in one window. Write your code in a tab, press F5, and the build runs and the program starts. Whatever it prints appears in the panel below as it happens, and when it waits on scanf or cin you type the answer into that same panel. Shift+F5 stops a program that will not end.
Each build is linked statically, so the .exe left next to your source file does not depend on DLLs from the app and can be copied to another Windows PC and run there.
A C++ compiler with modern standards and the old ones
Files ending in .c are treated as C and default to C17. Files ending in .cpp, .cc or .cxx are C++ and default to C++20. Both can be changed in Settings under C version and C++ version, which reach from C89 (ANSI C) up to C23 and from C++11 up to C++23. Optimization can be left Off or set to -O2 or -O3, and an Extra compiler flags box passes anything else straight to Clang.
Every build has -Wall switched on, so warnings about unused variables, suspicious comparisons and format mismatches show up in the Problems list even when the program compiles. Ctrl+Shift+M opens that list, and each entry jumps to its line.
Compiler errors and crashes, translated
Clang's messages are precise but not always friendly to someone in their first month of C. Along with the raw text, the app recognizes common mistakes and adds a short plain explanation. A few examples of what it catches:
- cout or vector used without std::, with the two ways to fix it
- A missing semicolon, pointing you to the end of the previous line
- An unclosed brace, a function called before it is declared, or a header name that does not exist
- void main() from older textbooks, and why modern C++ wants int main()
- A program still running that blocks the new .exe from being written
Run conio.h and Turbo C++ programs on Windows 10 and 11
Many courses still hand out code written for Turbo C. Rather than making you rewrite it, the app supplies compatibility headers so clrscr(), gotoxy(), textcolor(), getch() and delay() compile, along with the pre-standard iostream.h, fstream.h and iomanip.h. When the source uses console calls like these, the program is launched in its own console window automatically. The Run in a console window setting can force that on or off.
If a program crashes instead of exiting, the panel names what happened, such as an access violation from a bad pointer or a stack overflow from runaway recursion, instead of leaving you with a bare exit code.
