Character Set, Tokens, Variables, Constants, Escape Characters
Primary, Secondary types, Qualifiers (signed, short, long, unsigned) and sizes
printf, scanf, getchar, putchar, gets, fgets, puts
Arithmetic, Relational, Logical, Bitwise, Ternary, etc.
if, if-else, else-if ladder, switch case
for, while, do-while, break, continue, goto
Math library prototypes and functions