重载赋值运算符

#include<iostream.h>
class sample
{
<wbr>int n;<br> public:<br><wbr>sample(){}<br><wbr>sample(int i){n=i;}<br><wbr>sample &amp;operator=(sample s)<wbr><wbr>//重载赋值运算符<br><wbr>{<br><wbr><wbr>n=s.n;<br><wbr><wbr>return *this;<br><wbr>}<br><wbr>void disp()<br><wbr>{<br><wbr><wbr>cout&lt;&lt;"n="&lt;&lt;n&lt;&lt;endl;<br><wbr>}<br> };<br> void main()<br> {<br><wbr>sample s1(10),s2;<br><wbr>s2=s1;<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><br><wbr>cout&lt;&lt;"s1:";s1.disp();<br><wbr>cout&lt;&lt;"s2:";s2.disp();<br> }</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

说明：“operator=成员函数”实现两个对象的赋值。但是如果去掉重载运算符的成员函数，程序依然可以运行。所以正常情况下，系统会为每一个类自动生成一个默认的赋值运算符，用来完成对象之间的赋值运算。