yc-zhang / guess-number

It's a simple program to describe how we deal with unit test.

Guess Number

Introduction

We are going to use TDD to develop a simple guess number game with the following rules:

• While the game starts, the program will output a four digits number and each digit is unique like 9527.
• Then the game will ask player to input the number, each digit is unique too, and reply prompts in format xAxB.
• If one digit of input number matches the value and correct position, count 1 for A.
• If a digit matches value only, count 1 for B.
• Print Game Over for 6 rounds if not matched and end the game.
• Print Congratulations! if matched and end the game.

Example

Case 1

• Game generates number 1234, the player input 1234
• Output 4A0B

Case 2

• Game generates number 1234, the player input 4321
• Output 0A4B

Case 4

• Game generates number 1234, the player input 9324
• Output 1A2B