我知道应该有一个删除运算符,我不会在某个地方关注它.我只是想知道,哇,它有效. “大小”的论点来自何处？
#include<iostream>
#include<string>
class Base {
public:
Base() { }
void *operator new( unsigned int size,std::string str ) {
std::cout << "Logging an allocation of ";
std::cout << size;
std::cout << " bytes for new object '";
std::cout << str;
std::cout << "'";
std::cout << std::endl;
return malloc( size );
}
private:
int var1;
double var2;
};
int main(int argc,char** argv){
Base* b = new ("Base instance 1") Base;
}
结果如下：
为新对象’Base instance 1’记录16字节的分配
