lab2 - CS240 Lab 2 Number Conversion and Palindromic...

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CS240 Lab 2 Number Conversion and Palindromic Numbers Project Goal: To manipulate characters/numbers/strings, do base conversion and format output. It introduces you to a new problem that may show you how computer scientists become interested in questions for which answers may not be known. This leads to a search for algorithms and answers that often lead to other questions. This is the research process. Topics covered: Functions, global variables, for, while, if, local variables, getchar(), basic printf, one and two-dimensional arrays, string manipulation (copy, compare, reverse, concatenate) and output-formatting using a two-dimensional array. Task 0: Download the Initial Source Files Download the file lab2-src.tar and untar it by typing the command. tar -xvf lab2-src.tar The directory lab2-src contains the initial sources as well as the script testall that will test all your programs. To build your programs type "make" inside the directory lab2- src. Make sure you compile and test your programs in lore.cs.purdue.edu. Task 1: Number conversions Write a program to convert a given number from one base to another. The format is: convert <basefrom> <baseto> <number> You now know how to input arguments on the command line. Assume that basefrom and baseto are integers between 2 and 25 (both inclusive). Since base 16 uses the characters A, B, C, D, E, F to represent decimal numbers 10 through 15, bases 17 through 20 will involve additional characters. For example, base 20 will involve the additional characters G, H, I and J. Use defensive programming to make sure your command line arguments are what you would expect. You may assume that no number (in any base) has more than 32 digits, and all numbers are nonnegative.
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To convert a number, say (123)9, from base 9 to another base such as base 8, simply convert from base 9 to decimal (i.e., base 10), to get the number, i.e., (1 x 9 2 ) + (2 x 9
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This note was uploaded on 02/18/2012 for the course CS 240 taught by Professor Rego during the Fall '08 term at Purdue University-West Lafayette.

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lab2 - CS240 Lab 2 Number Conversion and Palindromic...

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