a (97) - z (122)
0 (48) - 9 (57)
enter - 13
space - 32
@ - 64
Who calls main()? OS.
Execution starts at main.
<< : output / put to / stream insertion operator
>> : input / get from / stream extraction operator
- calculation R to L
- printing L to R
Digital Number System In digital representation, various number systems are used. The most common ones are : Binary : base 2 (0, 1) Octal : base 8 (0, 1, 2, 3, 4, 5, 6, 7) Decimal : base 10 (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) Hexadecimal : base 16 (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F) Number Conversions : From Decimal to any system (base) (Decimal) 10 = (Any) base
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