itoabase program readme

subjects/itoabaseprog.en.md

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+## itoabaseprog
+
+### Instructions
+
+Write a program that:
+
+- converts a number in base 10 into the number in the specified base
+- the program receives two parameter:
+  - the first is the value
+  - the second is the base
+
+The base is expressed as an `int`, from 2 to 16. The characters comprising
+the base are the digits from 0 to 9, followed by uppercase letters from A to F.
+
+For example, the base `4` would be the equivalent of "0123" and the base `16` would be the equivalent of "0123456789ABCDEF".
+
+If the value is negative, the resulting `string` has to be preceded with a
+minus sign `-`.
+
+### Expected output
+
+```console
+student@ubuntu:~/piscine-go/itoabaseprog$ go build
+student@ubuntu:~/piscine-go/itoabaseprog$ ./itoabaseprog 15 16
+F
+student@ubuntu:~/piscine-go/itoabaseprog$ ./itoabaseprog 255 2
+11111111
+student@ubuntu:~/piscine-go/itoabaseprog$ ./itoabaseprog -4 2
+-100
+student@ubuntu:~/piscine-go/itoabaseprog$ ./itoabaseprog -df sdf
+The value "-df" can not be converted to int
+student@ubuntu:~/piscine-go/itoabaseprog$ ./itoabaseprog 23 ew
+The value "ew" can not be converted to int
+student@ubuntu:~/piscine-go/itoabaseprog$ ./itoabaseprog 4 23
+
+student@ubuntu:~/piscine-go/itoabaseprog$ 323 12
+22B
+student@ubuntu:~/piscine-go/itoabaseprog$
+```