Design and code a number converter, that can convert a positive decimal integer number among the “base-x” formats, where x=2,3,…, 12:
•base-2: a string of “0” and “1”. For example, 1010.
•base-3: a string of “0”, “1” and “2”. For example,21210.
…
•base-11: a string of “0”, “1”, …, “9” and “a”, where the value of “a” is “10”. For example,a783a5.
•base-12: a string of “0”, “1”, …, “9”, “a” and “b”, where the value of “a” is “10” and the value of “b” is “11”. For example,2a5b.
In general, in base-x, there are x digits used to represent the number. The decimal value of a number a3a2a1a0 in base-x is:
a3a2a1a0 = (a3×x3)+ (a2×x2)+ (a1×x1)+ (a0×x0)
For example,the decimal value of a base-3 number 21210 is
(2×34) + (1×33) + (2×32) + (1×31) + (0×30) = 162 + 27 + 18 + 3 + 0 = 210
the decimal value of a base-12 number 2a5b is
(2×123) + (10×122) + (5×121) + (11×120) = 2×1728 + 10×144 + 5×12 + 11 = 4967
Requirements:
•The program recieves an input number in the base-x format (x is specified by the user, the input number has at most 5 digits), then converts this number into a required format (also specified by the user).
•The program can print sufficient guiding message to ask the user to input the number and choose the output format. For example:
Grading criteria:
•Correctness: 3 marks.
The program can correctly print guiding messages, receive inputs, convert the number as required, print the outputs.
•Robustness: 1 marks:
If the program recieves incorrect or self-contradictary inputs, the program can print proper feedback to users and let them retry.
•Good programming style: 1 marks.
The source code are properly structured (e.g., using indents) and well commented.
•Bonus: 1 marks.
Other (useful) features beyond the above requirements. If your program includes any bonus feature, please submit a separate WORD document to clearly introduce it and make sufficient comments in the source code to explain the corresponding codes. 兩個不同進制的數字之和
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