what is "comp" in your code?
On Wed, Aug 10, 2011 at 6:19 PM, aanchal goyal <goyal.aanch...@gmail.com>wrote:
> I have a vector of stuct, how to sort this vector?
> problem is I can't overload the '<' operator in struct definition, as i
> want to sort by 'x' one time, and then by 'y'. I tried to write the
> comparator function separatley but its no working. How to do it?
>
> #include<iostream>
> #include<algorithm>
> #include<vector>
>
> using namespace std;
>
>
> typedef struct
> {
> int x;
> int y;
> }point;
>
> struct comp_x
> {
> bool operator()(point &a, point &b)
> return a.x<b.x;
> }
>
> struct comp_y
> {
> bool operator()(point &a, point &b)
> return a.y<b.y;
> }
>
> int main()
> {
> vector<point> vc;
> int n;
> cin>>n;
> point a;
>
> for(int i=0;i<n;i++)
> {
> cin>>a.x;
> cin>>a.y;
> vc.push_back(a);
> }
> cout<<endl;
> sort(vc.begin(), vc.end(), comp);
>
> for(int i=0;i<n;i++)
> {
> cout<<vc[i].x<<" "<<vc[i].y<<endl;
> }
>
> system("pause");
> return 0;
> }
>
>
> --
> Regards,*
> Aanchal Goyal*.
>
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