Repeat Exercise 1.69 but convert from an arbitrary base b1 to another base b2, as specified by the user. Support bases up to 16, using the letters of the alphabet for digits greater than 9. The user should enter b1, b2, and then the number to convert in base b1. The program should print the equivalent number in base b2.

Data From Problem 69

Write a program in your favorite language (e.g., C, Java, Perl) to convert numbers from binary to decimal. The user should type in an unsigned binary number. The program should print the decimal equivalent.