Prompt algorithm

[petr pavlovich]

Input file:

ddd
bbb
ccc
aaa
bbb
aaa
bbb

output file:

bbb -3
aaa - 2

duplicate lines, indicating the number of repetitions
what algorithm?

[fred rosenberger]

clearly you know the algorithm...you generated the output in your post.

How did you figure out that this:

bbb -3
aaa - 2

goes in your output file?

[petr pavlovich]

fred rosenberger wrote:clearly you know the algorithm...you generated the output in your post.

How did you figure out that this:

bbb -3
aaa - 2

goes in your output file?

??? I have not understood You(

[Wouter Oet]

How did you mentally come up with that output?

[fred rosenberger]

In your original post, you gave us the input:

ddd
bbb
ccc
aaa
bbb
aaa
bbb

SOMEHOW, you were able to then say

"I want my program to output this:
bbb -3
aaa - 2

You used your own brain to figure out what that output should be. How did you do it in your head?

I am 100% serious in saying you should write down the steps you used in your head. make them simple and clear. When you've done that, go back and refine them to be more specific. You can't say "I counted the number of times bbb occurred", because I would come back with "How did you know to count 'bbb'? Once you knew you needed to count those, how did you count them?"

[petr pavlovich]

 
int k=o;
for(i=0;i<=arr.length;i++){
     for(j=0;j<=arr.length;j++){
          if(arr[i].equals(arr[j])) {
              g=g+1;
                          }
            System.out.println(g);
            System.out.println(arr[i]);
      }
}
 

((((((
Console

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 7
at SortString.main(gg.java:91)

[Paul Clapham]

The standard Java idiom for iterating through the elements of an array is this:

for(i=0;i<arr.length;i++)

Whereas you have this:

for(i=0;i<=arr.length;i++)

See the difference? You are iterating one time too many.>

[Jim Hoglund]

If you don't need to change anyTypeArray (below) as you scan
through it (add, delete, etc.), a further improved version is:

   for (AnyType obj : anyTypeArray) {
      // do something with each obj...
   }

Jim ... ...