Moderate Question 5 | 吉祥三宝的各种practice记录

Moderate Question 5 | 吉祥三宝的各种practice记录

The Game of Master Mind is played as follows:
The computer has four slots containing balls that are red (R), yellow (Y), green (G) or blue (B). For example, the computer might have RGGB (e.g., Slot #1 is red, Slots #2 and #3 are green, Slot #4 is blue).
You, the user, are trying to guess the solution You might, for example, guess YRGB.
When you guess the correct color for the correct slot, you get a "hit" If you guess a color that exists but is in the wrong slot, you get a "pseudo-hit". For example, the guess YRGB has 2 hits and one pseudo hit.
For each guess, you are told the number of hits and pseudo-hits.
Write a method that, given a guess and a solution, returns the number of hits and pseudo-hits.

 

Analysis:

This problem in easy in terms of logic and hard in terms of writing a bug-free program.

First, we use a code function to transform the character into an index, then we use a frequency array to check has been used as a hit OR  a pseudo hit, if the slot has been used, it can no longer be used to get pseudo hit. (it point is not vert clear in the problem statement)

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