Sorting a vector of structure based on structure member

Question

2.33/5 (3 votes)

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Hi,
I have a vector of structures.
Struct Task
{
int field1;
int field2;
};
vector <task> vec;

How can i sort the vector based on "field1" ?
I used the following code for sorting:

C#

bool sortByField1(Task *t1, Task *t2)
{
    if(t1->field1> t2->field1)
    {
        return true;
    }
    else
        return false;
}

and called

C#

std::sort(vec.begin(), vec.end(),
          sortByField1());

I get error saying sortByField1() does not take 0 param.

I googled and i did not get anything that could help my case.
Please provide your inputs.

Posted 15-Jun-12 20:21pm

RedUnited

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RedUnited · Accepted Answer · 2012-06-15T21:08:00

Solution 1

C#

bool sortByField1(Task &t1, Task &t2)
{
    if(t1->field1> t2->field1)
    {
        return true;
    }
    else
        return false;
}
and called

std::sort(vec.begin(), vec.end(),
          sortByField1);

Posted 15-Jun-12 21:08pm

RedUnited

v2

Comments

[no name] 16-Jun-12 6:31am

So you post a question. An hour later you post the answer and then accept your own answer. Cute.

Why not just spend the extra hour before asking the question?

wangChung1970 16-Jul-13 15:11pm

Because somebody might have this exact same question some day....like me, now!