C++中sort的用法示例

C++中sort的用法示例：

# include <iostream>
# include <vector>
# include <algorithm>
using namespace std;
typedef struct node {
int arr[2];
};
bool my_compare(const node &a1,const node &a2)
{
if (a1.arr[0]>a2.arr[0]) return false;
else if ((a1.arr[0]==a2.arr[0]) && (a1.arr[1]>a2.arr[1])) return false;
else return true;
}
int main()
{
int i,j,k,n;
vector <node> a;
node temp;
cin >> n;
for (i=0;i<n;i++){
cin >> temp.arr[0] >> temp.arr[1];
a.push_back(temp);
}
sort(a.begin(),a.end(),my_compare);
for (i=0;i<a.size();i++) cout <<'('<<a[i].arr[0]<<','<<a[i].arr[1]<<')';
cout << endl;
return 0;
};