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pair.c
Package: leda.tar.gz [view]
Upload User: gzelex
Upload Date: 2007-01-07
Package Size: 707k
Code Size: 1k
Category:
Mathimatics-Numerical algorithms
Development Platform:
MultiPlatform
- #include <LEDA/list.h>
- class pair {
- double x;
- double y;
- public:
- pair() { x = y = 0; }
- pair(const pair& p) { x = p.x; y = p.y; }
- friend istream& operator>>(istream& is, pair& p)
- { return is >> p.x >> p.y; }
- friend ostream& operator<<(ostream& os, const pair& p)
- { return os << p.x << " " << p.y; }
- friend int compare(const pair&, const pair&);
- };
- void Print(const pair& p, ostream& out) { out << p; }
- void Read(pair& p, istream& in) { in >> p; }
- int compare(const pair& p, const pair& q)
- { if (p.x < q.x) return -1;
- if (p.x > q.x) return 1;
- if (p.y < q.y) return -1;
- if (p.y > q.y) return 1;
- return 0;
- }
- #if !defined(__TEMPLATE_FUNCTIONS__)
- LEDA_TYPE_PARAMETER(pair)
- #endif
- main()
- {
- list<pair> L;
- L.read("list of pairs: ");
- L.sort();
- L.print("sorted:n",'n');
- }