C Programming Quick Reference

• Program Functions and Files
• Data Types Keywords

  void, char, int, float, double, short, long, enum, ...

  Pointer, Array, Structure, ...

  typedef, extern, static, const, ...

• Constants

  Escape sequences:    \n, \", \0, ...

  Data type constants: 0x7F, 100UL, 1.0E-3, ...

• Program Flow Keywords

  if-else, for, while, switch, return, ...

• Operators

  +,+=,++,--,<<,>>,==,!=,&&,||,&,|,~,->, ...

• Preprocessor

  #include, #define, #ifdef, #if, #else, #endif, ...

• Standard Library

  stdio.h, stdlib.h, ctype.h, string.h, math.h, ...

  printf, scanf, fopen, fclose, atoi, atof, malloc, free, ...