在STL编程中我们常见的数据类型是char int string等。若要用复杂数据类型（类类型），你必须重载必要的运算符。下例即演示了这一点：
-
#include <iostream>
#include <list>
using namespace std;// 重载 < 运算符
class CMyClass
{
public:
int x;
int y;
char z;CMyClass()
{
x = 0;
y = 0;
z = ´ ´;
}
~CMyClass(){};
void print(const CMyClass &CMyClass)
{
cout << CMyClass.x << ´ ´ << CMyClass.y << ´ ´ << CMyClass.z << endl;
}int operator<(const CMyClass &rhs) const
{
if( this->x == rhs.x && this->y == rhs.y && this->z < rhs.z) return 1;
if( this->x == rhs.x && this->y < rhs.y) return 1;
if( this->x < rhs.x ) return 1;
return 0;
}
};// 必须用LIST模版类的内建SORT函数排序
list<CMyClass> sortIt( list<CMyClass>& myList)
{
myList.sort();
return myList;
}main()
{
list<CMyClass> myList, sortedList;
CMyClass MyClass ;MyClass.x=3;
MyClass.y=2;
MyClass.z=´A´;
myList.push_back(MyClass);MyClass.x=2;
myList.push_back(MyClass);MyClass.z=´B´;
myList.push_back(MyClass);MyClass.x=1;
MyClass.y=5;
MyClass.z=´C´;
myList.push_back(MyClass);list<CMyClass>::iterator i;
for(i=myList.begin(); i != myList.end(); ++i)
{
cout<< " ";
MyClass.print(*i);
}
cout << endl;sortedList = sortIt( myList );
cout << "Sorted: " << endl;
for(i=sortedList.begin(); i != sortedList.end(); ++i)
{
cout<< " ";
MyClass.print(*i);
}
cout << endl;return 0;
}
输出:
- 3 2 A
2 2 A
2 2 B
1 5 C- Sorted:
1 5 C
2 2 A
2 2 B
3 2 A - Sorted:
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