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Execution flow of c program

🚀 Execution Flow of a C Program (Professional Description) The execution of any C program follows a systematic, step-by-step flow. Below is the complete flow with clear explanation: --- 1️⃣ Program Creation The programmer writes the C code using any text editor or IDE (e.g., VS Code, Turbo C, CodeBlocks). The file is saved with a .c extension. Example: program.c --- 2️⃣ Preprocessing Before compilation, the preprocessor runs. It handles: #include → header files are added #define → macros are expanded Removes comments Output: a modified source code file (usually with .i extension) --- 3️⃣ Compilation The compiler translates the preprocessed code into assembly language. It checks: Syntax errors Type errors Output: Assembly code file (usually .s) --- 4️⃣ Assembly The assembler converts the assembly code into machine code. Output: an object file (.o or .obj) --- 5️⃣ Linking The linker combines: Object file Library files (like stdio.h functions) Generates the final executable file (Windows → .exe, Linux → a.out) --- 6️⃣ Loading The loader loads the executable into RAM. It assigns memory for: Code Global variables Stack Heap --- 7️⃣ Execution The program starts execution from the main() function. Statements run one by one. Control flows according to logic (loops, conditions, functions). --- 📌 Summary Chart (Simple) Source Code (.c) ↓ Preprocessing ↓ Compilation ↓ Assembly ↓ Linking ↓ Executable File ↓ Loading into Memory ↓ Program Execution (main())