字符串类（没带软盘）
#include "stdafx.h"#include <iostream.h>
#include <string.h>
class cstring
{
private:
char *m_a;
public:
void fuzhi(char *p);
void fuzhi(int i,char p);
void display();
void display(int i);
int getlen();
int getlen(char *p);
void jiaru_q(char *p);
void jiaru_h(char *p);
int tonngji(char *p);
void tihuan_word(char *p1,char *p2);
cstring();
void operator=(char *p);
};
cstring::cstring()
{
m_a="bl world cc world";
}
void cstring::fuzhi(char *p)
{
if(m_a!=0)
delete []m_a;
m_a=new char;
strcpy(m_a,p);
}
void cstring::fuzhi(int i,char p)
{
if(i>=0&&i<getlen(m_a))
m_a=p;
else
cout<<"不能成功复制\n";
}
void cstring::display()
{
cout<<m_a<<endl;
}
void cstring::display(int i)
{
if(i>=0&&i<getlen(m_a))
cout<<m_a<<endl;
}
int cstring::getlen()
{
for(int i=0;m_a!='\0';i++)
{}
return i;
}
int cstring::getlen(char *p)
{
for(int i=0;p!='\0';i++)
{}
return i;
}
void cstring::jiaru_q(char *p)
{
int n1=getlen(p);
int n2=getlen();
char *temp=new char;
strcpy(temp,p);
strcat(temp,m_a);
delete []m_a;
m_a=temp;
}
void cstring::jiaru_h(char *p)
{
int n1=getlen(p);
int n2=getlen();
char *temp=new char;
strcpy(temp,m_a);
strcat(temp,p);
delete []m_a;
m_a=temp;
}
int cstring::tonngji(char *p)
{
int n2,m=0;
int n1=getlen(p);
for(int i=0;m_a!='\0';i++)
{ n2=0;
if(p==m_a)
{
n2=1;
for(int j=1;p!='\0';j++)
if(p==m_a)
{
n2++;
}
}
if(n1==n2)
m++;
}
return m;
}
void cstring::tihuan_word(char *p1,char *p2)
{
int n3,j;
int m=0;
int n1=getlen(p1);
int n2=getlen(p2);
if(n1==n2)
{
for(int i=0;m_a!='\0';i++)
{
n3=0;
if(p1==m_a)
{
n3=1;
for(j=1;p1!='\0';j++)
if(p1==m_a)
n3++;
}
if(n1==n3)
{
for(j=0;p2!='\0';j++)
{
m_a=p2;
}
}
}
}
else
cout<<"不能成功复制\n";
}
void cstring::operator =(char *p)
{
int n=getlen(p);
char *temp=new char;
m_a=temp;
strcpy(m_a,p);
}
int main(int argc, char* argv[])
{
cstring a;
a.display();
a="snk--king of fight";
cout<<"现在字符串：\n";
a.display();
int serve,i;
char b,c;
do
{
cout<<"你要进行什么操作：\n"
<<"1.设置串值\n"
<<"2.设定串中某一位置的值\n"
<<"3.取得串值\n"
<<"4.取得串中某一位置的值\n"
<<"5.取得串长\n"
<<"6.在字符串之前加入新子串\n"
<<"7.在字符串之后加入新子串\n"
<<"8.统计串中出现的某个字符或单词的个数\n"
<<"9.对串中出现的某个字符或单词替换\n"
<<"10.退出\n";
cin>>serve;
if(serve==1)
{
cout<<"请输入字符串\n";
cin>>b;
a.fuzhi(b);
}
if(serve==2)
{
cout<<"请输入在什么位置赋上什么字符\n";
cin>>i;
cout<<"什么字符\n";
cin>>b;
a.fuzhi(i,b);
}
if(serve==3)
{
a.display();
cout<<endl;
}
if(serve==4)
{
cout<<"请输入你要取得哪个位置字符的";
cin>>i;
a.display(i);
}
if(serve==5)
{
cout<<a.getlen();
}
if(serve==6)
{
cout<<"你要在字符串之前加入什么：\n";
cin>>b;
a.jiaru_q(b);
}
if(serve==7)
{
cout<<"你要在字符串之后加入什么：\n";
cin>>b;
a.jiaru_h(b);
}
if(serve==8)
{
cout<<"你要对哪个单词进行统计：\n";
cin>>b;
cout<<a.tonngji(b);
}
if(serve==9)
{
cout<<"你要对哪字符或单词进行替换：\n";
cin>>b;
cout<<"替换成什么：\n";
cin>>c;
a.tihuan_word(b,c);
}
}while(serve!=10);
return 0;
}
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