C++ STL库应用汇总

#include <iostream>
#include <iterator>
#include <QApplication>
bool myfn( int i, int j )
{
 return i < j;
}

int main( int argc, char* argv[] )
{
 QApplication a( argc, argv );
 std::list<int> zx {1, 2, 3, 8, 5, 44};

 //方法一 调用函数
 auto biggest = std::max_element( std::begin( zx ), std::end( zx ), myfn );
 std::cout << "Max element is " << *biggest
      << " at position " << std::distance( std::begin( zx ), biggest ) << std::endl;
 //方法二 调用Lamda表达式
 auto nn = std::max_element( std::begin( zx ), std::end( zx ), []( int& i, int& j ) -> bool
 {
  return i < j;
 } );
 std::cout << "Max element is " << *nn
      << " at position " << std::distance( std::begin( zx ), biggest ) << std::endl;
 return a.exec();
}

auto max_pos =
   std::max_element( m_taskList.cbegin(), m_taskList.cend(),
            []( const TaskManagePtr & task1, const TaskManagePtr & task2 ) -> bool
  {
   return task1->priority() < task2->priority();
  } );