实现自己的英文单词MyWord类，为该类提供各种功能（加法、流插入、流提取、查找、替换）
#include<iostream>
#include<algorithm>
#include<cstring>
#include<cassert>
using namespace std;
class Myword
{
public:
char *pdata;
int length;
Myword(char *pw="",int size=0)
{
length=size;
pdata=new char[length+1];
strcpy(pdata,pw);
assert(pdata!=NULL);
pdata[length+1]='\0';
}
~Myword()
{
if(pdata!=NULL)
{
pdata=NULL;
}
}
};
Myword operator+(Myword &a,Myword &b) //加法
{
Myword temp;
temp.length=a.length+b.length;
temp.pdata=new char [temp.length+1];
assert(temp.pdata!=NULL);
strcpy(temp.pdata,a.pdata);
strcat(temp.pdata,b.pdata);
temp.pdata[temp.length+1]='\0';
return temp;
}
istream & operator >> (istream & is , Myword & rhs) // >> cin
{
is>>rhs.length>>rhs.pdata;
return (is);
}
ostream& operator<<(ostream &cout,const Myword &n)//cout
{
cout<<n.pdata<<'\t'<<n.length<<endl;
return cout;
}
void find(const Myword &a,const Myword &b,const Myword &c,const Myword &d)
{
if(strcmp(a.pdata,d.pdata)==0||strcmp(b.pdata,d.pdata)==0||strcmp(c.pdata,d.pdata)==0)
{
cout<<"found it !"<<endl;
}
else
cout<<"not found!"<<endl;
}
void replace(Myword &a,Myword &b)//用y替换x
{
a.length=b.length;
a.pdata=new char[a.length+1];
assert(a.pdata!=NULL);
strcpy(a.pdata,b.pdata);
a.pdata[a.length+1]='\0';
}
int main()
{
Myword a("Hell0",5);
Myword b("World",5);
cout<<"a="<<a<<endl;
cout<<"b="<<b<<endl;
Myword c;
c=a+b;
cout<<"c="<<c<<endl;
Myword d;
cin>>d;
cout<<"d="<<d<<endl;
find(a,b,c,d);
replace(a,b);
cout<<"a="<<a<<endl;
cout<<"b="<<b<<endl;
}
运行结果
