#define strmax 100
#include
#include
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
{
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
{
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:"<
int lstrlen (p1);
int m0;
int c0;
for(int bpos-1;b<64;b++,c++)
{
p2[c]line[b];
}
for(int apos-1;a
{
line[a]p1[m];
}
strcat(line,p2);
cout<
}
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:"<
if(p)
{
strcpy(n2,p);
for(int i0;i
{
if(n1[i]n2[0])
{
cout<
}
}
void string::replace(char *q,char *p)//q被替换串，考试,大提示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 : "<
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
{
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
{
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
{
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
{
cout<<"The word at "<
cout<<"s.print():"<
s.print();
cout<
s.turn();
cout<
s.substring(4,12);
cout<
s.insert(5,"abcdefgh");
cout<
s.index("LINE");
cout<
s.index("xyz");
cout<
s.replace("abc","DingTao");
cout<
s.replace("req","dakfj");
cout<
s.strempty();
string s1("abc"),s2("def"),s3("ghi"),s4("abcdefg"),s5("2008");
cout<
cout<<"after s1s1+s2 , s1";
s1s1+s2;
s1.print();
cout<
s1
cout<
s2s4;
cout<
s2!s3;
cout<
s5[3];
}
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