I still can't get this right. The code in the bubble sort is incorrect. How can I get this right? What should I change or add to get the correct results? Thanks in advance. :)
import java.util.Random;
import java.util.Scanner;
public class HomeWork {
public static void main(String[] args) {
Scanner s = new Scanner(System.in);
int choice;
int e;
Random t = new Random();
for (e = 1; e <= 5; e++) {
System.out.println(t.nextInt(1000));
}
System.out.println(" \n1: BUBBLE SORT ");
System.out.println(" 2: SELECTION SORT ");
System.out.println(" 3: QUICK SORT ");
System.out.println(" Choose a number from 1-3 ");
choice= s.nextInt();
if(choice == 1) {
System.out.print("You chose BUBBLE sort!");
int temp, q, w;
for(int i=0;i<w-1;i++) { //I think there is something wrong here in my bubble sort code.
// What should I add or change to make this correct?
for(int j=0;j<w-1-i;j++) {
if(q[j]>q[j+1]) {
temp = q[j];
q[j] = q[j+1];
q[j+1] = temp;
System.out.println(q[i]+""); // What should I change here to print the correct results?
} else if(choice == 2) {
System.out.print("You chose SELECTION sort!");
} else if(choice == 3) {
System.out.println("You chose QUICK sort!");
} else {
System.out.println("Not in the choices!");
}
}
}
}
}
}
I am still just a beginner. Please please help. Thanks in advance :)
public static void main(String[] args) {
int a[] = { 1, 5, 100, 40, 80, 50 };
int length = a.length;
int temp;
for (int i = 0; i < length; i++) {
for (int j = 1; j < length - i; j++) {
if (a[j - 1] > a[j]) {
temp = a[j - 1];
a[j - 1] = a[j];
a[j] = temp;
}
}
}
for (int i = 0; i < a.length; i++) {
System.out.print(a[i] + " ");
}
}
Like the guy commented above, this the bubble sorting algorithm, and the guy above that, your Variable (w) is wrong, all wrong, and as a tip in the future, post the error, with the code, that's probably why you got a downvote and or because this is pretty simple.
Also forgive me, but i dont have eclipse, and am now coding in C++, but this should work
int x[] = new int[5]
Random t = new Random();
for (e = 1; e <= 5; e++) {
x[e] = t.nextInt(1000); // you didn't even assign any variables to sort, that's one problem, you just printed them.
} // and idk how you get random int's in java, but if this doesn't work, just make your own random int generator.
// There's LOTS of better ones than the one your using now.
int temp, q, w;
for(int i=0;i< 5;i++) {
for(int j=0;j<5-i;j++) {
if(q[j]>q[j+1]) {
temp = q[j-1];
q[j-1] = q[j];
q[j] = temp;
}
// Add 'else ifs' here
}
}
for (int i = 0; i < 5; i++) { // and this will print the results
System.out.print(q[i] + " ");
}
This should work, idk, not really experienced in java >.>, and btw there are tons of books that teach algorithm's, you should first look through your code really well, because of it's a simply mistake like now, these people on stack overflow aren't merciful, there all experience programmer that are really hard on you, but they are smart. (like me :D)
[EDIT] -btw, just merge this with your code, but here are some useful sites. for random int's - http://www.javapractices.com/topic/TopicAction.do?Id=62 for bubble sort - http://examples.javacodegeeks.com/core-java/bubble-sort-algorithm-in-java-code-example/