Key Features of C Playground
- Monaco Editor Integration Edit your C files in a fully-featured visual compiler editor with syntax highlighting.
- Interactive Stdout Console Execute your standard C output and read compile logs instantly inside the browser panel.
- Judge0 Sandbox Execution Run your standard library C logic inside a secure sandbox running GCC.
C Playground Examples
Classic Hello World
Print text to standard output using the standard IO library.
Input
#include <stdio.h>
int main() {
printf("Hello, World!\n");
return 0;
}Output
Hello, World!How to Use C Playground
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1. Write C Code
Type your C program using standard C11 syntax and the standard library.
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2. Compile and Run
Click Run or press ⌘↵. Judge0 compiles with GCC and executes your program.
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3. Read Output
Compiler errors and program output appear in the Output panel.
Common Use Cases for C Playground
- Learning C Basics Practice memory allocation, variables, structures, and pointers without setting up a local compiler.
- Prototyping Algorithms Quickly test recursive functions, sorting routines, or string operations.
- Benchmarking Execution Time Check exact compilation and execution times returned directly by Judge0.
The Technical Details
The C Playground submits your source code securely to the Judge0 API, where it is compiled and executed via GCC inside a sandboxed, isolated container. All outputs (stdout and stderr) are returned in real time, guaranteeing maximum security and local isolation.
Frequently Asked Questions
Which C standard is used?
GCC compiles with C11 on the Judge0 CE sandbox.
Can I use external libraries?
Only the C standard library (stdio.h, stdlib.h, string.h, math.h, etc.) is available.
Is there a time or memory limit?
Yes. The Judge0 sandbox enforces execution time and memory limits to prevent infinite loops.
Is my code private?
Code is submitted to the public Judge0 CE API. Avoid pasting sensitive data.