How do I make a program to convert Octadecimal value to Decimal, Hexadecimal to Binary and Hexadecimal to Octadecimal.

Please help meee! T.T

Sscanf doesn't do octadecimal; it'll do decimal, binary, hexadecimal and octal.
Octa and dec implies 8 and 10, so digits 0-9, A-H. CProgrammmmer, do you mean octal (digits 0-7) or octadecimal (0-H)?

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