运算符重载的方法有很多,这里简单的举了各例子
加号重载代码如下,写法有很多种~
#pragma warning( disable : 4996)
#include <stdio.h>
#include
#include
using namespace std;
class MyString
{
public:
MyString()//无参构造函数
{
cout << “MyString()//无参构造函数” << endl;
len = 0;
str = NULL;//str="";
};
MyString(const char *str)//有参构造函数
{
cout << “MyString(const char *str)//有参构造函数” << endl;
if (str == NULL)
{
this->len = 0;
this->str = new char[0 + 1];
strcpy(this->str, str);
}
this->len = strlen(str);
this->str = new char[this->len + 1];
strcpy(this->str, str);
};
friend MyString operator +(MyString &thisString, MyString &another);
public:
int len;
char *str;
};
MyString operator + (MyString &thisString, MyString &another)
{
MyString temp;
int len = strlen(thisString.str) + strlen(another.str);
temp.len = len;
temp.str = new char[len + 1];
memset(temp.str, 0, len + 1);
strcat(temp.str, thisString.str);
strcat(temp.str, another.str);
return temp;
}
void main()
{
MyString str1(“1234”);//调用有参构造函数
MyString str2(“12345”);//调用有参构造函数
MyString str3;
str3 = str1 + str2;
cout << str3.str << endl;
system(“pause”);
};