/* Name:Cpp parse custom tags in file By: Michael Simnitt Date:12/13/17 Purpose:Demonstrate how to parse a file for custom tags and replace them with appropriate text */ #include #include // Global Variables: std::string tagList[3] = {"Name","W","R"}; //tag list entries std::string start = "<&"; //begining tag std::string stop = "&>"; //ending tag std::string name = "Sololearn"; //default in case of null entry using namespace std; void writeFile(string str){ ofstream outFile("sample.txt"); //open file for output if(!outFile) //verify file created cout<<"Error (writeFile): output file could not be created."; cout<<"File created successfully.\n"; outFile< if (*str == tagList[0]){ return name; }// 1 <&W&> else if (*str == tagList[1]){ return "write"; }// <&R&> else if (*str == tagList[2]){ return "read"; } else // string does not match a tag in list return "< UNKNOWN TAG >"; } string getTag(string *str){ //cout<<"checking tag\n"; int firstFlag; string mystring; while(true){ // loop until no more tags are found in line firstFlag = str->find(start); //attempt to find a tag start if(firstFlag!= string::npos) //check to see if a tag start was found //get tag from start to stop, and store in mystring mystring = str->substr( firstFlag+start.length(), (str->find(stop,firstFlag+1)-firstFlag)-start.length() ); else // no tags remaining in line return ""; //replace tag with value returned from setTag function str->replace(firstFlag,(str->find(stop,firstFlag+1))-(firstFlag-stop.length()), setTag(&mystring) ); } //return processed line return mystring; } void parseFile(){ cout<<"\nParsing file:\n"; string line, outputString; ifstream infile("sample.txt"); if (infile.is_open()){ while( getline (infile,line) ){ //cout<<"Input:"<>name; writeFile("Greetings <&Name&>,\n\n Thank you for viewing my code!\n*This code <&W&>s a file\n*Then <&R&>s and outputs that file\n*Then <&R&>s the file again parsing it for tags\n*Then <&W&>s over the file using returned tag text\n*Then lastly <&R&>s the file again and outputs processed file.\n"); readFile(); parseFile(); readFile(); //output tag array (tagList) cout<<"\nTag List Values:\n "; for (string tag : tagList) cout<