简单文本编辑器c++源代码

#include <iostream> #include <cctype> #include <string> using namespace std; #include "TextEditor.h" //---吃掉cin中空白字符的工具函数 void eatBlanks() { char blank; while(cin.peek() == ' ') cin.get(blank); } //---构造函数定义 TextEditor::TextEditor(string inFileName,string outFileName) { //inStream.open(inFileName.c_str()); //outStream.open(outFileName.c_str()); inStream.open(inFileName.data()); outStream.open(outFileName.data()); if ( !inStream.is_open() || !outStream.is_open()) { //cout<<"Fail to Open file"<<endl; cerr<<"Fail to Open file"<<endl; exit(-1); } else { cout<<"Open File Succseeful..\n"; } } void TextEditor::run() { showMunu(); cout<<"Enter an editing command following each prompt >\n\n"; getline(inStream,currentLine); cout<<"TEXT: "<<currentLine<<endl; char command; string str1,str2; for(;;) { if(inStream.eof()) break; cout << '>'; cin >> command; cin.ignore(1,'\n'); switch(toupper(command)) { case 'I': eatBlanks(); getline(cin,str1); cout << "Insert before what string : "; getline(cin,str2); insert(str1,str2); break; case 'D': eatBlanks(); getline(cin,str1); erase(str1); break; case 'R': eatBlanks(); getline(cin,str1); cout << "With What? "; getline(cin,str2); replace(str1,str2); break; case 'N': next(); break; case 'Q': quit(); break; default : cout << "\n*** Illegal command ***\n"; showMunu(); cout << "TEXT: "<<currentLine<<endl; }//End of switch if(!inStream.eof()) cout << "TEXT: "<<currentLine<<endl; }//End of for cout<< "\n*** Editing complete ***\n"; } //---显示command void TextEditor::showMunu() { //cout<<"showMunu"<<endl; cout<<"Editing commands are:\n" "I str: Insert string str before another string\n" "D str: Delete string str\n" "R str: Replace string str with another string\n" "N : Get next line of text\n" "Q : Quit editing\n"; } //---插入 str1 在str2之前 void TextEditor::insert(string str1,string str2) { size_t position = currentLine.find(str2); if( position != string::npos ) currentLine.insert(position,str1); else cout<<"\""<< str2<<"\"" <<" not found\n"; } //---清除str void TextEditor::erase(string str) { size_t position = currentLine.find(str); if (position != string::npos) currentLine.erase(position,str.length()); else cout<<"\""<< str<<"\"" <<"not found\n"; } //---用str2替换str1 void TextEditor::replace(string str1,string str2) { size_t position = currentLine.find(str1); if (position != string::npos) currentLine.replace(position,str1.length(),str2); else cout<<"\""<< str1 <<"\"" <<" not found\n"; } //---读取下一行 void TextEditor::next() { outStream << currentLine<<endl; getline(inStream,currentLine); cout << "\nNext Line:\n"; } //---退出程序 void TextEditor::quit() { outStream << currentLine<<endl; for(;;) { getline(inStream,currentLine); if(inStream.eof()) break; outStream << currentLine <<endl; }//End of for }