#define strmax 100
#include <iostream.h>
#include <cstring>
class string
{
char line[100];
int x,y;
public:
string(char *);
void print();
void turn();
int strlength();
void substring(unsigned,unsigned);
void insert(int,char *);
void index(char *);
void replace(char *,char *);
void strempty();
string operator (string s);
string operator + (string s);
void operator < (string s1);//判断字符窜长度
void operator (string s1);//字符窜相等
void operator ! (string s1);//字符窜不相等
char operator [] (int pos);
};
string::string(char *n)
{
strcpy(line,n);
}
void string::print()
{
cout<< line;
}
void string::turn()
{
int i,lenstrlen(line);
for(i0;i<len;i++)
{
if(line[i]>97&&line[i]<122)
{
line[i]-32;
cout<< line[i];
}
else
{
cout<< line[i];
}
}
}
int string::strlength()
{
return strlen(line);
}
void string::substring(unsigned pos,unsigned len)
{
if(pos > strlen(line))
cout<<"Error!";
else
{
if((strlen(line)-pos) < len)
lenstrlen(line)-pos;
cout<<"The substring is:";
unsigned ipos+len;
for(pos;pos<i;pos++)
{
cout<< line[pos-1];
}
}
}
void string::insert(int pos,char *p)
{
char p1[64];
char p2[64];
strcpy(p1,p);
cout<<"The line which will be insert is:"<<p1;
int lstrlen (p1);
int m0;
int c0;
for(int bpos-1;b<64;b++,c++)
{
p2[c]line[b];
}
for(int apos-1;a<pos+l;a++,m++)
{
line[a]p1[m];
}
strcat(line,p2);
cout<<endl<<"The line after inserting is:"<<line;
}
void string::index(char *n)
{
char *p;
char n1[100];
char n2[100];
strcpy(n1,line);
strcpy(n2,n);
pstrstr(n1,n2);
int l;
lstrlen(n1);
cout<<"The words you want to find is:"<<n;
if(p)
{
strcpy(n2,p);
for(int i0;i<l;i++)
{
if(n1[i]n2[0])
{
cout<<endl<<"The position of the words which you wanted is "<<i+1;
break;
}
}
}
else
{
cout<<endl<<"There isn’t the words which you wanted.";
}
}
void string::replace(char *q,char *p)//q被替换串，青年人网提示p替换串
{
char p1[100];
char p2[100];
char p3[100];
strcpy(p1,line);
strcpy(p2,p);
strcpy(p3,q);
pstrstr(p1,p3);
if(p)
{
int i,j;
int lpstrlen(p);
int lp1strlen(p1);
int lp2strlen(p2);
int lp3strlen(p3);
cout<<"The sourse string is : "<<line<<endl<<"You want to change : "<<p3;
for(ilp1-lp,j0;j<lp2;i++,j++)
line[i]p2[j];
for(jlp3;p[j];i++,j++)
line[i]p[j];
line[i]’\0’;
cout<<endl<<"After change : "<<line;
}
else
{
cout<<q<<" is not the substring of "<<line;
}
}
责任编辑：小草
