key.cpp

来自「数据结构与程序设计教材源码 数据结构与程序设计教材源码」· C++ 代码 · 共 49 行

 
int Key::comparisons = 0;
 
int Key::the_key() const
{
   return key;
}
 
Key::Key (int x)
{
   key = x;
}
 
bool operator ==(const Key &x, const Key &y)
{
   Key::comparisons++;
   return x.the_key() == y.the_key();
}
 
bool operator !=(const Key &x, const Key &y)
{
   Key::comparisons++;
   return x.the_key() != y.the_key();
}

bool operator >=(const Key &x, const Key &y)
{
   Key::comparisons++;
   return x.the_key() >= y.the_key();
}

bool operator <=(const Key &x, const Key &y)
{
   Key::comparisons++;
   return x.the_key() <= y.the_key();
}

bool operator >(const Key &x, const Key &y)
{
   Key::comparisons++;
   return x.the_key() > y.the_key();
}

bool operator <(const Key &x, const Key &y)
{
   Key::comparisons++;
   return x.the_key() < y.the_key();
}