void string::strempty()
{
int istrlen(line);
if(i0)
{
cout<<"The string is empty !";
}
else
{
cout<<"The string is not empty !";
}
}
string string::operator (string s1)
{
strcpy(line,s1.line);
return *this;
}
string string::operator + (string s1)
{
strcat(line,s1.line);
return *this;
}
void string::operator < (string s1)
{
int lstrlen(s1.line);
int mstrlen(line);
if(m<l)
{
cout<<"less and equal";
}
else
{
cout<<"not less and equal";
}
}
void string::operator ! (string s1)
{
char n1[100];
strcpy(n1,s1.line);
int l;
lstrlen(line);
int m;
mstrlen(n1);
if(l!m)
cout<<"judge not equal correct";
else
{
for(int i0;i<l;i++)
{
if(line[i]n1[i])
{
if(il-1)
cout<<"judge not equal error";
}
else
{
cout<<"judge not equal correct";
break;
}
}
}
}
void string::operator (string s1)
{
char n1[100];
strcpy(n1,s1.line);
int m;
mstrlen(n1);
int l;
lstrlen(this->line);
if(l!m)
{
cout<<"judge equal error";
}
else
{
for(int i0;i<l;i++)
{
if(line[i]n1[i])
{
if(il-1)
cout<<"judge equal correct";
}
else
{
cout<<"judge equal error";
break;
}
}
}
}
char string::operator [](int pos)
{
int ipos;
int lstrlen(line);
if(i>-1&&i<l)
{
cout<<"The word at "<<pos<<" is "<<line[i]<<endl;
return line[i];
}
else
{
cout<<"There is no word at "<<pos<<endl;
return 0;
}
}
void main()
{
string s("The line is a line.");
cout<<"s.print():"<<endl;
s.print();
cout<<endl<<"s.turn():"<<endl;
s.turn();
cout<<endl<<"The length of the string is "<<s.strlength();
cout<<endl<<"s.substring(4,12):"<<endl;
s.substring(4,12);
cout<<endl<<"s.insert(5,abcdefgh):"<<endl;
s.insert(5,"abcdefgh");
cout<<endl<<"s.index(LINE):"<<endl;
s.index("LINE");
cout<<endl<<"s.index(xyz):"<<endl;
s.index("xyz");
cout<<endl<<"s.replace(abc,DingTao)"<<endl;
s.replace("abc","DingTao");
cout<<endl<<"s.replace(req,dakfj)"<<endl;
s.replace("req","dakfj");
cout<<endl<<"s.strempty():"<<endl;
s.strempty();
string s1("abc"),s2("def"),s3("ghi"),s4("abcdefg"),s5("2008");
cout<<endl<<"s1abc\ts2def\ts3ghi\ts4abcdefg\ts52008"<<endl;
cout<<"after s1s1+s2 , s1";
s1s1+s2;
s1.print();
cout<<endl<<"s1<s4"<<endl;
s1<s4;
cout<<endl<<"s2s4"<<endl;
s2s4;
cout<<endl<<"s2!s3"<<endl;
s2!s3;
cout<<endl<<"s5[3]"<<endl;
s5[3];
}
责任编辑：小草
