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How do you sort an array? [using bubble sort]
Here's my code:
What should I put after the "num[j+1]=num[j]"?import java.util.*; class array1{ public static void main(String args[]){ Random number = new Random(); int num[] = new int[100]; // filling array with random numbers for(int i=0;i<100;i++){ int randomnumber = 10+number.nextInt(89); num[i] = randomnumber; System.out.print(num[i]+" "); } // Sorting the array for(int i=0;i<100;i++){ for(int j=0;j<100;j++){ if(num[j]>num[j+1]){ num[j]=num[j+1]; num[j+1]=num[j]; } } } } }
Re: How do you sort an array? [using bubble sort]
This:
Will not swap values. For example, let's say:num[j]=num[j+1]; num[j+1]=num[j];
num[j]=10
num[j+1]=12
After we run the first line of code, the values become:
num[j]=12
num[j+1]=12
And after we run the second line of code, the values stay:
num[j]=12
num[j+1]=12
Why? Because we never "remembered" the previous value of num[j]
Instead, you want to:
1. Store the value of num[j] in a variable (int var, for example)
2. Do the first line of code from earlier
3. Instead of the second line of code, we want: num[j+1] = var;
Does that make sense?
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