实验三include.doc

# include class OOStringpublic:OOString();OOString(char *s);OOString(OOString&m);/构造、析构函数OOString();public:int Strlen(char *s);char Strcpy(char*ss,char *s);/实现字符串的复制/连接/求字符串的长度char *Strcat(char*ss,char *s);public:void print(); char* GetSubStr(int n,int m);int Length();char GetChar(int n);void Insert(int n,char *s);char *Cat(OOString&m);void Append(char *s);void Append(OOString&m);public:OOString operator =(char *s);/赋值运算重载函数private:int m_nLength;char *m_strBuffer;/实现字符串的复制/连接/求字符串的长度int OOString:Strlen(char *s)m_nLength=0;char *p=s;while(*p!=0)m_nLength+=1;p+;return m_nLength; char OOString:Strcpy(char *ss,char *s)while(*ss+=*s+);return *ss;char *OOString:Strcat(char*ss,char *s)char *p;int m=Strlen(ss);int n=Strlen(s);p=new char m+n+1;Strcpy(p,ss);pm=*s;int i=m;while(*s!=0)pi+=*s+;pi=0;return p;/构造、析构函数OOString:OOString()m_nLength=0;m_strBuffer=NULL;OOString:OOString(char *s)if(s!=NULL)int len=Strlen(s);m_strBuffer=new charlen+1; Strcpy(m_strBuffer,s);else m_strBuffer=0; OOString:OOString(OOString&m)if(m.m_strBuffer!=0)int len=Strlen(m.m_strBuffer);m_strBuffer=new charlen+1; Strcpy(m_strBuffer,m.m_strBuffer);else m_strBuffer=0;OOString:OOString()if(m_strBuffer!=NULL)delete m_strBuffer;/void OOString:print()/输出字符串if(m_strBuffer=NULL)coutemptyendl;coutm_strBufferendl;char* OOString:GetSubStr(int n,int m)/从n开始取字符串m_nLength=Strlen(m_strBuffer);if(m=m_nLength)m_nLength=m-n;else m_nLength=m_nLength-n;char *p=new charm_nLength+1;for(int i=0;im_nLength;i+)pi=m_strBuffern+i;pi=0;return p;int OOString:Length()/输出字符串的长度m_nLength=Strlen(m_strBuffer);return m_nLength;char OOString:GetChar(int n)/获得字符 char ch;m_nLength=Strlen(m_strBuffer);if(nm_nLength)ch=0;else ch=*(m_strBuffer+n);return ch;void OOString:Insert(int n,char *s)/插入char*ss;int a=Strlen(m_strBuffer); int b=Strlen(s);ss=new char a+b+1;for(int i=0;in;i+)ssi=m_strBufferi;for(int j=0;jb;i+,j+)ssi=sj;for(int t=n;tm_strBuffer,m.m_strBuffer);return s;void OOString:Append(char *ss)char *s;int len=Strlen(ss);s=new charm_nLength+len+1;s=Strcat(m_strBuffer,ss);deletem_strBuffer;m_strBuffer=s;void OOString:Append(OOString&m)char *s;int len=Strlen(m.m_strBuffer);s=new charm_nLength+len+1;s=Strcat(m_strBuffer,m.m_strBuffer);deletem_strBuffer;m_strBuffer=s;/赋值运算重载函数OOString OOString:operator =(char *s)if(m_strBuffer!=NULL)delete m_strBuffer;m_strBuffer=NULL;if(s=NULL)m_strBuffer=NULL;elseint len=Strlen(s)+1;m_strBuffer=new charlen;Strcpy(m_strBuffer,s);return *this;/void main ()/-1OOString str1,str2(abcd),str3(hello,CPP); OOString str(str2);/-2str.print();/-3OOString strHello=str3.GetSubStr(0,5); strHello.print(); strHello=str3.GetSubStr(7,10);strHello.print();/-4OOString strHelloCPP=str3.GetSubStr(0,9);strHelloCPP.print();/-5coutstrHelloCPP.Length()endl;/-6char ch=strHelloCPP.GetChar(2);coutchendl;/-7strHelloCPP.Insert(5, world);strHelloCPP.print();/-8OOString strCatTest=strHelloCPP.Cat(