Description
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 doesn’t matter.
Hint: in C, printf with %-10s will left justify a string in 10 characters, %10s will right justify it.