本文实例为大家分享了C++实现文本编辑器的具体代码,供大家参考,具体内容如下
1.简易文本编辑器
2.用链表实现,保存到文件中
#include<iostream> #include<string> #include<cstdlib> #include<ctype.h> #include<cstdio> #include<fstream> using namespace std; int NumberCount=0;//数字个数 int CharCount=0;//字母个数 int PunctuationCount=0;//标点符号个数 int BlankCount=0;//空白符个数 class Node { public: string character; int cursor; int offset; Node* next; Node(){ cursor=0;//每行的光标初始位置 offset=0;//每行的初始偏移位置 next=NULL; } }; class TextEditor { private: Node* head; string name; int line;//可更改的行数 int length;//行数 public: TextEditor(); ~TextEditor(); string GetName(); void SetName(string name); int GetCursor(); int MoveCursor(int offset); int SetCursor(int line,int offset); void AddText(const string s); void InsertText(int seat,string s); int FindText(string s); void DeleteText(string s); int GetLine(); void Count(); friend ostream& operator<<(ostream& out,TextEditor &text); Node* Gethead(){ return head; } //int GetLength() //{ // return length; // } // int FindText(string s); // void DeleteText(int seat,string s); }; TextEditor::TextEditor() { head=NULL; name="test";//文件初始名 //tail=NULL; line=1; length=0; } TextEditor::~TextEditor() { Node* p=head; Node* q; while(p!=NULL){ q=p->next; delete p; p=q; } } int TextEditor::GetLine() { return line; } string TextEditor::GetName() { return name; } void TextEditor::SetName(string name) { this->name=name; } int TextEditor::GetCursor() { Node *p=head; while(p->next!=NULL) p=p->next; return p->cursor; } int TextEditor::MoveCursor(int offset) { Node *p=head; int i=1; if(length+1<line){ cout<<"输入错误!"<<endl; exit(0); } else{ while(p->next!=NULL&&i<line){ p=p->next; i++; } } if(offset>p->character.length()){ cout<<"移动位置太大!"<<endl; exit(0); } else p->cursor+=offset; //cout<<"p ->cursor="<<p->cursor<<endl; return p->cursor; } int TextEditor::SetCursor(int line,int offset) { this->line=line; //cout<<"line="<<this->line<<endl; return MoveCursor(offset); } void TextEditor::AddText(const string s) { line=length+1; Node* p=new Node; Node* q=head; p->character=s; p->next=NULL; if(head==NULL) head=p; else{ while(q->next!=NULL) q=q->next; q->next=p; } length++; // line++; } void TextEditor::InsertText(int seat,string s) { Node *p=head; int i=1; if(length+1<line){ cout<<"输入错误!"<<endl; exit(0); } else{ while(p->next!=NULL&&i<line){ p=p->next; i++; } } //MoveCursor(seat); //cout<<"p->cursor="<<p->cursor<<endl; string substr; for(int i=seat;i<s.length()+seat&&i<=p->character.length();i++) substr+=p->character[i]; p->character.insert(p->cursor,s); cout<<"substr="<<substr<<endl; DeleteText(substr);//覆盖子串 p->cursor=0;//光标清零 } ostream& operator<<(ostream& out,TextEditor &text) { int i=1; Node* p=text.Gethead(); while(p!=NULL){ out<<p->character<<endl; p=p->next; } // cout<<"length="<<text.GetLength()<<endl; return out; } int TextEditor::FindText(string P) { Node* q=head; //int templine=1; line=1; int p=0; int t=0; int plen=P.length()-1; //cout<<"P="<<P<<endl; //cout<<"plen="<<plen<<endl; int tlen=q->character.length(); while(q!=NULL){ p=0; t=0; tlen=q->character.length(); if(tlen<plen){ line++; q=q->next; } while(p<plen&&t<tlen){ if(q->character[t]==P[p]){ t++; p++; } else{ t=t-p+1; p=0; } } // cout<<"P="<<P<<endl; // cout<<"p="<<p<<endl; // cout<<"plen="<<plen<<endl; if(p>=plen){ return t-plen+1; } else{ line++; q=q->next; } } return -1; } void TextEditor::DeleteText(string s) { Node *p=head; int i=1; int k=FindText(s); if(k==-1) cout<<"未出现该字符串!"<<endl; else{ while(p!=NULL&&i<line){ p=p->next; // cout<<p->character<<endl; i++; } p->character.erase(k-1,s.length()); cout<<"删除成功!"<<endl; } } void TextEditor::Count() { Node *p=head; NumberCount=0; CharCount=0; PunctuationCount=0; BlankCount=0; while(p!=NULL){ for(int i=0;i<p->character.length();i++){ if(p->character[i]>='0'&&p->character[i]<='9') NumberCount++; else if(p->character[i]>'a'&&p->character[i]<'z'||p->character[i]>'A'&&p->character[i]<'Z') CharCount++; else if(ispunct(p->character[i])) PunctuationCount++; else if(p->character[i]==' ') BlankCount++; } p=p->next; } } int main() { int i,j,k,n=2; string s,t,name; TextEditor text; cout<<"---------------------------------------"<<endl; cout<<"1.添加字符"<<endl; cout<<"2.设置文档免费精选名字大全"<<endl; cout<<"3.获取文档免费精选名字大全"<<endl; cout<<"4.显示光标位置"<<endl; cout<<"5.设置光标位置,在光标位置处插入文本"<<endl; cout<<"6.在文档中查找文本"<<endl; cout<<"7.在文档中删除文本"<<endl; cout<<"8.统计字母、数字、标点符号、空白符号及总字符个数"<<endl; cout<<"9.输入文本"<<endl; cout<<"0.退出"<<endl; while(n){ // cout<<endl; cout<<endl; cout<<"---------------------------------------"<<endl; cout<<"请输入:"; cin>>n; getchar(); switch(n){ case 1: cout<<"请输入字符:"; getline(cin,s,'n'); text.AddText(s); break; case 2: cout<<"请输入文档免费精选名字大全:"; cin>>name; text.SetName(name); break; case 3: cout<<text.GetName()<<endl; break; case 4: cout<<"光标在第"<<text.GetLine()<<"行,第"<<text.GetCursor()<<"个字符前!"<<endl; break; case 5:{ cout<<"输入行数:"; cin>>i; cout<<"光标在第"<<text.GetCursor()<<"个字符前!"<<endl; cout<<"输入移动位数:"; cin>>j; cout<<"输入插入字符:"; getchar(); getline(cin,s); text.InsertText(text.SetCursor(i,j),s); break; } case 6: { cout<<"输入查找的字符串:"; getline(cin,s); int k=text.FindText(s); if(k==-1) cout<<"查找失败!"<<endl; else cout<<"所查找文本首次出现在:"<<text.GetLine()<<"行,第"<<k<<"个字符处!"<<endl; break; } case 7: cout<<"输入要删除的字符串:"; getline(cin,s); text.DeleteText(s); break; case 8: { text.Count(); cout<<"文档中共有:"<<endl; cout<<NumberCount<<"个数字"<<endl; cout<<CharCount<<"个字母"<<endl; cout<<PunctuationCount<<"个标点符号"<<endl; cout<<BlankCount<<"个空白字符"<<endl; cout<<"共有"<<NumberCount+CharCount+PunctuationCount+BlankCount<<"个字符!"<<endl; break; } case 9: cout<<text; break; case 0:{ string ss=text.GetName(); ss+=".txt"; cout<<ss<<endl; ofstream outFile(ss.c_str()); Node* p=text.Gethead(); while(p!=NULL){ outFile<<p->character<<endl; p=p->next; } exit(0); break; } default: cout<<"输入错误,请重新输入!"<<endl; break; } } }
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