[Solved] CS 3844-Homework #1

Homework #1 Binary / Octal / Decimal / Unsigned / Hex

CS 3844 Section 0B1,

Write a C program that takes one or more numbers on the command line. Rules:

• If no numbers are given, print a usage message and quit.
• Do NOT use sscanf or similar. Process each argument one digit at a time.
• For each number given on the command line, check to see if it is a valid binary, octal, decimal and hex number. For hex numbers, allow both lowercase a-f and uppercase A-F.
• If there are any invalid characters in the argument, ignore it. E.g., a 2 is not valid for binary.
• You must also account for a leading minus sign. Additional error checking is not necessary (overflow for example).

Example usage: ./hw1 0 123 abcd -45 error -1 -4D

Example output:

=== Checking 0 Octal Decimal Unsigned Hex

Base 2: 0 0 0 0

Base 8: 0 0 0 0

Base 10: 0 0 0 0

Base 16: 0 0 0 0

=== Checking 123 Octal Decimal Unsigned Hex

Base 8: 123 83 83 53

Base 10: 173 123 123 7b

Base 16: 443 291 291 123

=== Checking abcd Octal Decimal Unsigned Hex

Base 16: 125715 43981 43981 abcd

=== Checking -45 Octal Decimal Unsigned Hex

Base 8: 37777777733 -37 4294967259 ffffffdb

Base 10: 37777777723 -45 4294967251 ffffffd3

Base 16: 37777777673 -69 4294967227 ffffffbb

=== Checking error Octal Decimal Unsigned Hex

=== Checking -1 Octal Decimal Unsigned Hex

Base 2: 37777777777 -1 4294967295 ffffffff

Base 8: 37777777777 -1 4294967295 ffffffff

Base 10: 37777777777 -1 4294967295 ffffffff

Base 16: 37777777777 -1 4294967295 ffffffff

=== Checking -4D Octal Decimal Unsigned Hex

Base 16: 37777777663 -77 4294967219 ffffffb3

The columns must line up exactly as shown, but the number of spaces between columns doesnt matter.

Hint: in C, printf with %-10s will left justify a string in 10 characters, %10s will right justify it.