Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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Python 3 

In Chapter 4, we developed an algorithm for converting from binary to decimal. You can generalize this algorithm to work for a representation in any base. Instead of using a power of 2, you will write a program that converts any base between 2 and 16. Recall that for numbers 10 - 15 we use letters A - F. In convert.py, define a function named repToDecimal that expects two arguments, a string, and an integer. The second argument should be the base. For example, repToDecimal("10", 8) returns 8, whereas repToDecimal("10", 16) returns 16. • The function should use a lookup table to find the value of any digit. Make sure that this table (it is actually a dictionary) is initialized before the function is defined. • For its keys, use the 10 decimal digits (all strings) and the letters A... F (all uppercase). The value stored with each key should be the integer that the digit represents. (The letter A associates with the integer value 10, and so on.) • The main loop of the function should convert each digit to uppercase, look up its value in the table, and use this value in the computation. A main function that tests the conversion function with numbers in several bases has been provided.
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Transcribed Image Text:In Chapter 4, we developed an algorithm for converting from binary to decimal. You can generalize this algorithm to work for a representation in any base. Instead of using a power of 2, you will write a program that converts any base between 2 and 16. Recall that for numbers 10 - 15 we use letters A - F. In convert.py, define a function named repToDecimal that expects two arguments, a string, and an integer. The second argument should be the base. For example, repToDecimal("10", 8) returns 8, whereas repToDecimal("10", 16) returns 16. • The function should use a lookup table to find the value of any digit. Make sure that this table (it is actually a dictionary) is initialized before the function is defined. • For its keys, use the 10 decimal digits (all strings) and the letters A... F (all uppercase). The value stored with each key should be the integer that the digit represents. (The letter A associates with the integer value 10, and so on.) • The main loop of the function should convert each digit to uppercase, look up its value in the table, and use this value in the computation. A main function that tests the conversion function with numbers in several bases has been provided.
A main function that tests the conversion function with numbers in several bases 3 # A main for testing your program has been provided. 4 def main(): 5. """Tests the function." print(repToDecimal('10', 10)) An example of main and correct output is print (repToDecimal('10', 8)) print (repToDecimal('10', 2)) print (repToDecimal('10', 16)) shown below: 8 10 def main(): 11 # The entry point for program execution name main() print(repToDecimal('10', 10)) 12 if "_main_": 13 print(repToDecimal('10', 8)) 14 print(repToDecimal('10', 2)) print(repToDecimal('10', 16)) 10 8 2 16 2.
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Transcribed Image Text:A main function that tests the conversion function with numbers in several bases 3 # A main for testing your program has been provided. 4 def main(): 5. """Tests the function." print(repToDecimal('10', 10)) An example of main and correct output is print (repToDecimal('10', 8)) print (repToDecimal('10', 2)) print (repToDecimal('10', 16)) shown below: 8 10 def main(): 11 # The entry point for program execution name main() print(repToDecimal('10', 10)) 12 if "_main_": 13 print(repToDecimal('10', 8)) 14 print(repToDecimal('10', 2)) print(repToDecimal('10', 16)) 10 8 2 16 2.
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