例用友元函数重载运算符实现两字符串加法

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1、【例6.4】用友元函数重载运算符实现两字符串加法。#include#includeclassString{charname[256];public:String(char*str){strcpy(name,str);}String(){}~String(){}friendStringoperator+(constString&,constString&);voiddisplay(){cout<<"Thestringis:"<

2、a,constString&b){strcpy(str,a.name);strcat(str,b.name);returnString(str);}voidmain(){str=newchar[256];Stringdemo1("Visualc++");Stringdemo2("6.0");demo1.display();demo2.display();Stringdemo3=demo1+demo2;demo3.display();Stringdemo4=demo3+"Programming.";demo4.display();Stringdemo5="Programming."+

3、demo4;demo5.display();deletestr;}程序的运行结果为：Thestringis:Visualc++Thestringis:6.0Thestringis:Visualc++6.0Thestringis:Visualc++6.0Programming.Thestringis:Programming.Visualc++6.0Programming.