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c++ removing duplicates from an array

 
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c++ removing duplicates from an array
sorikorik
11 May, 2008 - 05:37 PM
Post #1

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i've been working on this for around 2 days and i can't find out how to do it. i only know how to set an "auto" code which is something like this:

CODE
#include <ext/hash_set>
#include <iostream>
using namespace std;

int main()
{
    int hold;
    typedef __gnu_cxx::hash_set<int> TyHash;
    int data[] = {1, 2, 3, 2, 3, 4};

    TyHash unique_set(data, data + 6);

    cout << "Set items:" << endl;
    for (TyHash::iterator iter = unique_set.begin(); iter != unique_set.end(); iter++)
          cout << *iter << " ";
    cout << endl;
    cin >> hold;
}


but i want it to be able to ask stuff, like this:
Please enter 10 integers, hitting return after each one:
5
75
10
75
5
80
10
5
5
50
You entered 5 distinct numbers:
5 75 10 80 50
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skaoth
RE: C++ Removing Duplicates From An Array
11 May, 2008 - 07:40 PM
Post #2

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You can simply use the stl::set object

Remember to #include <set>
CODE

....
int ary[] = {1, 50, 100, -1, 5,  1, 44, 100 };
int arySize =  sizeof(ary) / sizeof(int);
    
std::set<int> mySet;
    
for(int i = 0; i < arySize; i++)
{
    mySet.insert(ary[i]);
}

std::set<int>::iterator itr;
for(itr = mySet.begin(); itr != mySet.end(); itr++)
{
    std::cout << *itr << " ";
}
std::cout << std::endl;
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