sort函数//IntegerComparator()这个括号运算符不是有俩个参数吗?为什么不需要传参数呀???
#include<algorithm>
#include<iostream>
#include<vector>
using namespace std;
class Integer
{
public:
Integer(void):m_nValue(100)
{
cout<<"Integer::Integer()invoked"<<endl;
}
Integer(int nValue):m_nValue(nValue){}
Integer(const Integer& intOther):m_nValue(intOther.m_nValue)
{
cout<<"Integer(Integer)"<<endl;
}
Integer& operator=(const Integer& intOther)
{
cout<<"Integer::operator"<<endl;
if(&intOther!=this)
m_nValue=intOther.m_nValue;
return*this;
}
/* bool operator<(const Integer&intRight)const
{
return m_nValue<intRight.m_nValue;
}*/
int m_nValue;
};
class IntegerComparator
{
public:
bool operator()(const Integer& intLeft,const Integer&intRight)
{
return intLeft.m_nValue<intRight.m_nValue;
}
};
int main()
{
vector<Integer>vi1(3);
vector<Integer>vi2;
vi2.push_back(Integer(2));
vi2[0]=Integer(3);
vi2.resize(4);
vi2[1]=Integer(12);
vi2[2]=Integer(2);
vi2[3]=Integer(58);
sort(vi2.begin(),vi2.end(),IntegerComparator());
return 0;
}
bool IntegerComparator::operator()(const Integer& intLeft,const Integer&intRight)
