A for() loop in a for() loop

Can be closed, I'm an idiot

Brackets are your friends.

Code:

    int numbers[] = { 1, 1, 2, 4, 4, 5, 7, 8, 8, 9 };
    int i, j;
    
    for(i=0; i<10; i++)
    {
    for(j=i+1; j<10; j++)
    {
    if(numbers[i] == numbers[j]) 
    cout << "Duplicate values are: " << numbers[i] << endl;
    }
    }

Brackets aren't needed here, i just don't understand how these for loops work.

I'm pretty damn sure you need brackets... and even if you don't you should add them anyway, it makes it easier for people to read your code.

But anyway I see your problem. Your making j = i +1. You should make j=0. That was say the second for loop will be able to look through the entire array to find a match for element [i].

you can also add cout statement to make it more clear.

Code:

    int numbers[] = { 1, 1, 2, 4, 4, 5, 7, 8, 8, 9 };
    int i, j;
    
    for(i=0; i<10; i++)
    {
      cout << "i is now" << i <<endl;
        for(j=i+1; j<10; j++)
              {
                cout << "j is now" << j <<endl;
               if(numbers[i] == numbers[j]) 
               cout << "Duplicate values are: " << numbers[i] << endl;
              }           
    }

Originally Posted by why06

I'm pretty damn sure you need brackets... and even if you don't you should add them anyway, it makes it easier for people to read your code.

But anyway I see your problem. Your making j = i +1. You should make j=0. That was say the second for loop will be able to look through the entire array to find a match for element [i].

lol read my question, the code works fine but i simply dont understand how it works

Originally Posted by BooYa

lol read my question, the code works fine but i simply dont understand how it works

So you don't know how a for loop works?

Code:

for(int i = 0/*Init I as 0*/; i<10/*if I is below 10*/;i++/*increment it*/)

Hmm never mind... I just didn't understand how the second for loop would work inside the first and why j was set to i+1, but i understand now after trying those cout statements from laka

Ok...if you want me to... and thanks lalakiljip.

A for() loop in a for() loop

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