This is a small tool to convert number to different formats.

We will build it with flag -std=gnu99, cause we use some uitility that c99 does not support. Here is the command:

$ make

  Usage: ./nc [options]

  Options:

    -V, --version                 output program version
    -h, --help                    output help information
    -a, --all <num>               convert number to all formats
    -b, --bin [num]               convert number to binary format
    -d, --dec [num]               convert number to unsigned decimal format
    -H, --hex [num]               convert number to hex format
    -o, --oct [num]               convert number to octal format
    -s, --signed [num]            treat number as signed and set output bits

Now, it supports to convert several numbers one time. By changing the macro MAX_NUMBERS to modify the amounts of number which you want to convert at one time.

We define the number input format:

• binary 0bxxxxx
• octal 0xxxxx
• hex 0x/0X
• dec +123/-123 [do not started with 0]

Here some examples:

1. convert two different numbers into binary format

$ ./nc -b 123 -b 0x123 

2. convert a decimal to other three different format

$ ./nc -a 123

3. convert number1 to decimal and number2 to binary and octal

$ ./nc -d number1 -b -o number2

4. convert negative number to other format

$ ./nc -a -- -5

more....

Note: When convert negative number, we need to add -- before number.