word_ly0001.cpp

模仿word对英文字符的操作

#include"word_ly0001.h"
Astring::Astring(int sz)
	{maxSize=sz;
	 ch=new char[maxSize+1];
	 if(ch==NULL){cout<<"存储分配错误！"<<endl;exit(1);}
	 curLength=0;
	 ch[0]='\0';
	 for(int i=0;i<defaultsize/100;i++)ps[i]=0;
	 for(i=0;i<defaultsize/100;i++)ps_ws[i]=0;
	 for(i=0;i<defaultsize;i++)ws[i]=0;
	}
Astring::Astring(const char *init)
	{int len=strlen(init);
	 maxSize=(defaultsize>=len)?defaultsize:len;
	 ch=new char[maxSize+1];
	 if(ch==NULL){cout<<"存储分配错误！"<<endl;exit(1);}
	 curLength=len;
	 strcpy(ch,init);
	 for(int i=0;i<defaultsize/100;i++)ps[i]=0;
	 for(i=0;i<defaultsize/100;i++)ps_ws[i]=0;
	 for(i=0;i<defaultsize;i++)ws[i]=0;
	}
Astring::Astring(const Astring &ob)
	{maxSize=ob.maxSize;
	 ch=new char[maxSize];
	 if(ch==NULL){cout<<"存储分配错误！"<<endl;exit(1);}
	 strcpy(ch,ob.ch);
	 curLength=ob.curLength;
	 for(int i=0;i<defaultsize/100;i++)ps[i]=0;
	 for(i=0;i<defaultsize/100;i++)ps_ws[i]=0;
	 for(i=0;i<defaultsize;i++)ws[i]=0;
	}
bool Astring::operator()(int pos,int len)
	{Astring temp;
	 if(pos<0||pos+len>maxSize||len<0){temp.curLength=0;temp.ch[0]='\0';cout<<"参数不合理出错"<<endl;return false;}
	 else 
		{if(pos+len>curLength)len=curLength-pos;
		 for(int i=0,j=pos;i<len;i++,j++){temp.ch[i]=ch[j];temp.curLength=len;}
		 cout<<temp<<endl;
		 return true;
		}
	}
Astring& Astring::operator =(Astring &ob)
	{if(&ob!=this)
		{delete[]ch;
		 maxSize=ob.maxSize;
		 ch=new char[maxSize+1];
		 if(ch==NULL){cout<<"存储分配错误！"<<endl;exit(1);}
		 strcpy(ch,ob.ch);
		 curLength=ob.curLength;
		}
	 else cout<<"字符串自身赋值出错！"<<endl;
	 return *this;
	}
Astring& Astring::operator+=(Astring &ob)
	{char *temp=ch;
	 int n=curLength+ob.curLength;
	 int m=(maxSize>=n)?maxSize:n;
	 ch=new char[m+1];
	 if(ch==NULL){cout<<"存储分配错误！"<<endl;exit(1);}
	 strcpy(ch,temp);
	 strcat(ch,ob.ch);
	 maxSize=m;
	 curLength=n;
	 delete[]temp;
	 return *this;
	}
void Astring::operator [](int i)
	{if(i<0||i>=curLength)cout<<"位置参数"<<i+1<<"超界！"<<endl;
	 else cout<<ch[i]<<endl;
	}
int Astring::Find(Astring &pat,int k)const
	{for(int i=k;i<=curLength-pat.curLength;i++)
		{for(int j=0;j<pat.curLength;j++)
		 if(pat.ch[j]!=ch[i+j])break;
		 if(j==pat.curLength)return i;	//i是从0开始的，表示第几个还得加1
		}
	 return -1;
	}
int Astring::count_p()
	{int count=0,i=0;
	 //if(curLength>0)count=1;	//文件末尾若换行则count=0;若没有换行则count=1
	 while(1)
		{
		 while(i<curLength&&ch[i]!='\n')i++;
		 if(i<curLength)
			{i++;
			 count++;
			 ps[count]=i;
			}
		 else break;
		}
	  return count;
	 }
int Astring::count_w()
	{int count=0,i=0,j=0;
	 //if(curLength>0)count=1;
	 while(1)
		{
		 while(i<curLength&&ch[i]==' ')i++;
		 ws[count]=i;
		 while(i<curLength&&ch[i]!=' '&&ch[i]!='\n')i++;
		 if(ch[i]==' '){count++;i++;ws[count]=i;}
		 else if(ch[i]=='\n'){count++;i++;ps_ws[j]=count;j++;}
		 else break;
		}
	 return count;
	}
void Astring::search_one(int k,Astring &pat)	//逐个查找
	{int i=k,j=ps[k-1],m,n=1,t,x;
	 while(j<=curLength-pat.curLength)
		{m=Find(pat,j);
		 if(n==1&&m==-1){cout<<"共搜索到"<<n-1<<"个结果"<<endl;break;}
		 else if(n>1&&m==-1){cout<<"文章已结束，共搜索到"<<n-1<<"个结果"<<endl;break;}
		 else 
			{
			 while(1)
				{if(m>=ps[i-1]&&m<ps[i])
					{cout<<"第"<<n<<"个结果在第"<<i<<"段";break;}
				 else i++;
				}
			 if(k==1)t=0;
			 else t=ps_ws[k-2];
			 for(;;t++)
				{if(ws[t]==m)break;}
			 cout<<"的第"<<t+1-ps_ws[i-2]<<"个单词处"<<endl;
			 cout<<"1—查找下一处		2—停止查找"<<"		"<<"请选择：";
			 cin>>x;
			 if(x==1){j=m+pat.curLength;n++;}
			 else break;
			}
		}
	}
void Astring::search_all(Astring &pat)		//全篇查找
	{int i=1,j=ps[0],m,n=1;
	 while(j<=curLength-pat.curLength)
		{m=Find(pat,j);
		 if(m==-1){cout<<"共搜索到"<<n-1<<"个结果"<<endl;break;}
		 else 
			{while(1)
				{if(m>=ps[i-1]&&m<ps[i])
					{cout<<"第"<<n<<"个结果在第"<<i<<"段";break;}
				 else i++;
				}
			 for(int t=0;;t++)
				{if(ws[t]==m)break;}
			 cout<<"的第"<<t+1-ps_ws[i-2]<<"个单词处"<<endl;
			 j=m+pat.curLength;
			 n++;
			}
		}
	}
void Astring::replace_one(int k,Astring &pat,Astring &renew)
	{int i=k,j=ps[k-1],m,n1=1,n2=0,t,x;char *p;	
						//n1记录找到几个结果，n2记录替换了几处
	 while(j<=curLength-pat.curLength)
		{m=Find(pat,j);
		 if(n1==1&&m==-1){cout<<"很抱歉，文章中没有"<<pat<<endl;break;}
		 else if(n1>1&&m==-1){cout<<"文章已结束，共替换了"<<n2<<"处"<<endl;break;}
		 else 
			{while(1)
				{if(m>=ps[i-1]&&m<ps[i])
					{cout<<"第"<<n1<<"个结果在第"<<i<<"段";break;}
				 else i++;
				}
			 if(k==1)t=0;
			 else t=ps_ws[k-2];
			 for(;;t++)
				{if(ws[t]==m)break;}
			 cout<<"的第"<<t+1-ps_ws[i-2]<<"个单词处"<<endl;
			 cout<<"1—替换该处		2—取消操作"<<"		"<<"请选择：";
			 cin>>x;
			 if(x==1)
				{p=&ch[m];
				 strncpy(p,renew.ch,pat.curLength);
				 save_to_file(*this);
				 cout<<"替换完毕"<<endl;
				 n2++;
				}
			 cout<<"1—替换下一处		2—停止替换"<<"		"<<"请选择：";
				 cin>>x;
				 if(x==1){j=m+pat.curLength;n1++;}
				 else break;
			}
		}
	}
void Astring::replace_all(Astring &pat,Astring &renew)
	{int i=1,j=ps[0],m,n=1;char *p;
	 while(j<=curLength-pat.curLength)
		{m=Find(pat,j);
		 if(n==1&&m==-1){cout<<"很抱歉，文章中没有"<<pat<<endl;break;}
		 else if(n>1&&m==-1){cout<<"共搜索到"<<n-1<<"个结果，已全部替换完毕"<<endl;break;}
		 else 
			{p=&ch[m];
			 strncpy(p,renew.ch,pat.curLength);
			 j=m+pat.curLength;
			 n++;
			}
		}
	}
void Astring::cut_p(int k,Astring &cutbank)
	{int i=ps[k-1],j=0;
	 for(;i<ps[k];i++,j++){cutbank.ch[j]=ch[i];}
	 cutbank.ch[j]='\0';
	 cutbank.curLength=ps[k]-ps[k-1];
	 for(j=ps[k];j<curLength;j++)ch[j-cutbank.curLength]=ch[j];
	 curLength=curLength-cutbank.curLength;
	 cout<<"已将第"<<k<<"段剪切到剪切板上"<<endl;
	}
void Astring::copy_p(int k,Astring &cutbank)
	{int i=ps[k-1],j=0;
	 for(;i<ps[k];i++,j++){cutbank.ch[j]=ch[i];}
	 cutbank.ch[j]='\0';
	 cutbank.curLength=ps[k]-ps[k-1];
	 cout<<"已将第"<<k<<"段复制到剪切板上"<<endl;
	}
void Astring::paste(int k,Astring &cutbank)
	{char *temp=ch;
	 int i,j,t;
	 int n=curLength+cutbank.curLength;
	 int m=(maxSize>=n)?maxSize:n;
	 ch=new char[m+1];
	 if(ch==NULL){cout<<"存储分配错误！"<<endl;exit(1);}
	 for(i=0;i<ps[k-1];i++)ch[i]=temp[i];
	 for(t=i,j=0;j<cutbank.curLength;t++,j++)ch[t]=cutbank.ch[j];
	 for(;i<curLength;i++,t++)ch[t]=temp[i];
	 //ch[t]='\0';
	 curLength=n;
	 maxSize=m;
	 delete[]temp;
	 /*strcpy(ch,temp);
	 strcat(ch,cutbank.ch);
	 curLength=n;
	 maxSize=m;*/
	}
istream& operator>>(istream &in,Astring &str)
	{int i=0;
	 char x=getchar();
	 while(x!='\n')		//用'\n'控制输入结束，不能用别的字符，否则点确定时'\n'也算一个getchar() 
		{str.ch[i]=x;
		 x=getchar();
		 i++;
		}
	 str.curLength=i;
	 str.ch[i]='\0';	//使strlen=curLength而非maxSize
	 return in;
	}
ostream& operator<<(ostream &os,Astring &str)
	{for(int i=0;i<str.curLength;i++)os<<str.ch[i];
	 os<<endl;
	 return os;
	}
void save_to_file(Astring &Astr)
	{ofstream outfile("word.txt");	//默认为以输出方式打开磁盘文件“ios::out”
	 if(!outfile)
		{cerr<<"打开文件失败！"<<endl;
		 exit(1);
		}
	 for(int i=0;i<Astr.curLength;i++)outfile<<Astr.ch[i];
	 outfile.close();
	}
void get_from_file(Astring &Astr)	//以输入方式打开磁盘文件"word.txt",并输出到显示屏上
	{ifstream infile("word.txt",ios::in|ios::nocreate);
	 if(!infile)
		{cerr<<"打开文件失败！"<<endl;
		 exit(1);
		}
	 int i=0;
	 while(infile.get(Astr.ch[i]))
		{cout.put(Astr.ch[i]);
		 i++;}
	 cout<<endl;
	 Astr.curLength=i;
	 Astr.ch[i]='\0';
	 infile.close();
	}

int main()
	{Astring Astr,cutbank;	//cutbank为剪切板，记录剪切内容
	 int x;
	 get_from_file(Astr);
	A:Astr.count_p();Astr.count_w();
	 cout<<endl<<"请选择菜单："<<endl;
	 cout<<"1-统计段落数"<<"  "<<"2-统计单词数"<<"  "<<"3-查找"<<"  "
		 <<"4-替换"<<"  "<<"5-剪切"<<"  "<<"6-复制"<<"  "<<"7-粘贴"<<"  "<<"8-读取文件"<<"  "<<"0-退出"<<endl;
	 cout<<"请选择：";
	 cin>>x;
	 switch(x)
		{case 1:cout<<"该文章的段落数为"<<Astr.count_p()<<endl;goto A;
		 case 2:cout<<"该文章的单词数为"<<Astr.count_w()<<endl;goto A;
		 case 3:{int k;
				 Astring pat;
				 cout<<"1—全篇范围查找		2—逐个查找"<<"		"<<"请选择：";
				 cin>>x;
				 cout<<"请输入要查找的内容："<<endl;
				 cin>>pat;
				 if(x==1)Astr.search_all(pat);
				 if(x==2)
					{cout<<"请输入开始查找的段落：";cin>>k;
					 Astr.search_one(k,pat);}
				 goto A;
				}
		 case 4:{int k;
				 Astring pat,renew;
				 cout<<"1—全篇范围替换		2—逐个替换"<<"		"<<"请选择：";
				 cin>>x;
				 cout<<"请输入需要被替换的内容："<<endl;
				 cin>>pat;
				 cout<<"请输入替换后的内容："<<endl;
				 cin>>renew;
				 if(x==1)Astr.replace_all(pat,renew);
				 if(x==2)
					{cout<<"请输入开始替换的段落：";cin>>k;
					 Astr.replace_one(k,pat,renew);}
				 save_to_file(Astr);
				 goto A;
				}
		 case 5:{int k;
				 cout<<"请输入需要被剪切的段落：";
				 cin>>k;
				 Astr.cut_p(k,cutbank);
				 save_to_file(Astr);
				 goto A;
				}
		 case 6:{int k;
				 cout<<"请输入需要被复制的段落：";
				 cin>>k;
				 Astr.copy_p(k,cutbank);
				 //cout<<cutbank;
				 goto A;
				}
		 case 7:{int k;
				 cout<<"请输入粘贴的位置（段落）：";
				 cin>>k;
				 Astr.paste(k,cutbank);		
				 //Astr+=cutbank;
				 save_to_file(Astr);
				 cout<<"粘贴完毕"<<endl;
				 goto A;
				}
		 case 8:{cout<<"该文本文档内容为："<<endl;
				 get_from_file(Astr);
				 goto A;
				}
		 case 0:{cout<<"退出程序？"<<endl<<"1—确定       2—取消"<<endl;
				cin>>x;
				if(x==2)goto A;
				else break;}
		}
	 return 0;
	}