本文實例為大家分享了C++實現文本編輯器的具體代碼，供大家參考，具體內容如下
1.簡易文本編輯器
2.用鏈表實現，保存到文件中
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#include<iostream>#include<string>#include<cstdlib>#include<ctype.h>#include<cstdio>#include<fstream>using namespace std;int NumberCount=0;//數字個數int CharCount=0;//字母個數int PunctuationCount=0;//標點符號個數int BlankCount=0;//空白符個數 class Node{public: string character; int cursor; int offset; Node* next; Node(){ cursor=0;//每行的光標初始位置 offset=0;//每行的初始偏移位置 next=NULL; }}; class TextEditor{private: Node* head; string name; int line;//可更改的行數 int length;//行數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<<"輸入錯誤!"<<endl; exit(0); } else{ while(p->next!=NULL&&i<line){ p=p->next; i++; } } if(offset>p->character.length()){ cout<<"移動位置太大!"<<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<<"輸入錯誤!"<<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);//覆蓋子串 p->cursor=0;//光標清零} 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<<"未出現該字符串!"<<endl; else{ while(p!=NULL&&i<line){ p=p->next; // cout<<p->character<<endl; i++; } p->character.erase(k-1,s.length()); cout<<"刪除成功！"<<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.設置文檔名字"<<endl; cout<<"3.獲取文檔名字"<<endl; cout<<"4.顯示光標位置"<<endl; cout<<"5.設置光標位置，在光標位置處插入文本"<<endl; cout<<"6.在文檔中查找文本"<<endl; cout<<"7.在文檔中刪除文本"<<endl; cout<<"8.統計字母、數字、標點符號、空白符號及總字符個數"<<endl; cout<<"9.輸入文本"<<endl; cout<<"0.退出"<<endl; while(n){ // cout<<endl; cout<<endl; cout<<"---------------------------------------"<<endl; cout<<"請輸入:"; cin>>n; getchar(); switch(n){ case 1: cout<<"請輸入字符:"; getline(cin,s,'\n'); text.AddText(s); break; case 2: cout<<"請輸入文檔名字:"; cin>>name; text.SetName(name); break; case 3: cout<<text.GetName()<<endl; break; case 4: cout<<"光標在第"<<text.GetLine()<<"行，第"<<text.GetCursor()<<"個字符前!"<<endl; break; case 5:{ cout<<"輸入行數:"; cin>>i; cout<<"光標在第"<<text.GetCursor()<<"個字符前!"<<endl; cout<<"輸入移動位數:"; cin>>j; cout<<"輸入插入字符:"; getchar(); getline(cin,s); text.InsertText(text.SetCursor(i,j),s); break; } case 6: { cout<<"輸入查找的字符串:"; getline(cin,s); int k=text.FindText(s); if(k==-1) cout<<"查找失敗!"<<endl; else cout<<"所查找文本首次出現在:"<<text.GetLine()<<"行，第"<<k<<"個字符處!"<<endl; break; } case 7: cout<<"輸入要刪除的字符串:"; getline(cin,s); text.DeleteText(s); break; case 8: { text.Count(); cout<<"文檔中共有:"<<endl; cout<<NumberCount<<"個數字"<<endl; cout<<CharCount<<"個字母"<<endl; cout<<PunctuationCount<<"個標點符號"<<endl; cout<<BlankCount<<"個空白字符"<<endl; cout<<"共有"<<NumberCount+CharCount+PunctuationCount+BlankCount<<"個字符!"<<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<<"輸入錯誤，請重新輸入！"<<endl; break; } }} |
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原文鏈接：https://blog.csdn.net/qq_36099645/article/details/53011927
