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这篇文章主要介绍了C++怎么实现文本编辑器，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。
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.设置文档名字"<<endl;
cout<<"3.获取文档名字"<<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<<"请输入文档名字:"; 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;
}
}
}感谢你能够认真阅读完这篇文章，希望小编分享的“C++怎么实现文本编辑器”这篇文章对大家有帮助，同时也希望大家多多支持亿速云，关注亿速云行业资讯频道，更多相关知识等着你来学习!
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