Guess a number game written in Java (interesting)

Finally, I came into contact with Java. Java is really different from C, and the design idea is completely different.

Now I have experienced the amazing experience in object programming. I found that I have fallen in love with this programming language.

Two days ago, I had nothing to do with writing a Java guess digital game. In fact, I thought about it for a long time, but it has never been put into practice.

Just recently I just learned Java and wrote a game to train my trainer.

I remember that in junior high school, I played this game in the Learning Machine of wenquxing.

Generate four random numbers (0 ~ Between 9 and not repeated), and then the player guesses. A total of 6 opportunities

Every time you guess, the computer prompts players

If the number to be guessed is incorrect, the number a is displayed.

If the number to be guessed is the same and the corresponding position is the same, the number of B is displayed.

For example, the number to be guessed is 0713.

If the player enters 2045

1a0b is displayed. The number is 0 but the position is incorrect.

Players enter 0231 again

Display 2a1b

 

 

After all, this is the first interesting Java program I have written.

Guessdigit class (generates four random numbers that are not repeated)

Package guess number; import Java. util. *; public class guessdigit {private string digit = ""; Private Static final int size = 4; Public String getdigit () {random r = new random (); int n = 0; while (n <size) {string temp = ""; int I = R. nextint (10); temp + = (char) ('0' + I); If (! Digit. contains (temp) {digit + = (char) ('0' + I); N ++;} return digit;} public int getsize () {return size ;}}

Guessresult class (return the computer prompt result)

Package guess number; public class guessresult {private int A = 0; // The number of different positions with the same number. Private int B = 0; // number: guessdigit G = new guessdigit (); int size = G. getsize (); Public void getresult (string guessdigit, string digitin) {A = 0; B = 0; For (INT I = 0; I <size; I ++) {If (digitin. charat (I) = guessdigit. charat (I) {B ++ ;}}for (Int J = 0; j <size; j ++) {for (int K = 0; k <size; k ++) {If (digitin. charat (j) = guessdigit. charat (k) {// prevent repeated requests to a ++ A ++; break ;}}} A-= B; system. out. println (a + "A" + B + "B");} public int getb () {return B ;}}

Guessdigittester class (player testing class)

Package guess number; import Java. util. *; public class guessdigittester {/*** @ Param ARGs */public static void main (string [] ARGs) {system. out. println ("you have 6 chances! Enter four (0-9) numbers each time "); system. out. println ("A indicates that the number is included but the position is incorrect. B indicates that the number position is correct."); system. out. println ("good luck! "); Int COUNT = 6; int I = 0; string digitin; string guessdigit; Limit SC = new limit (system. in); guessresult G = new guessresult (); guessdigit H = new guessdigit (); guessdigit = H. getdigit (); for (I = 0; I <count; I ++) {digitin = SC. next (); If (digitin. length ()! = H. getsize () {system. out. println ("Enter four numbers:"); continue;} G. getresult (guessdigit, digitin); If (G. getb () = H. getsize () {system. out. println ("You guessed it! ");} Else {Int J = count-i-1; system. out. println ("You still have" + J + "") ;}} if (I >= count) {system. out. println ("sorry, this number is" + guessdigit); // H. getdigit (), which will re-initialize the number to guess }}}