Read from text file and seperate by a delimiter

Question

I'm trying to read from a textfile and then trying to place those in an object.

But I am not sure how to seperate a line into two variables (space as a delimiter).

The text file format is as follows (first 2 entries):

    Text1 [txt1]
    This is a description of text 1.More description of Text 1 here blah       blah blah.

    Text2 [txt2]
    This is the description of text 2.

I would like to place them into three sperate variables, one for the name (Text1), type which are the square brackets ([txt1) and finally the description (This is a description of text 1.)

I have the following code so far which does not seperate Text1 and [txt1]:

    if (myfile.is_open()) {
    string buffer;
    string currentText= "empty";
    string currentType= "empty";
    string currentDescription = "empty";

    while (!myfile.eof()) {

        getline(myfile, buffer); // Would like to seprate this line into two variables
        currentText = buffer;
        if (buffer == "") continue;

        getline(myfile, buffer);
        currentDescription = buffer;
        if (buffer == "") continue;

        TextObj newtext(currentText, iWantToEnterTypeHere, currentDescription);
        this->textVector.push_back(newText);
    }
    myfile.close();

I hope this made sense, I would appreciate any help. Cheers

For why `while (!myfile.eof()) {` is wrong, see https://stackoverflow.com/questions/5605125/why-is-iostreameof-inside-a-loop-condition-considered-wrong — , Apr 05 '18 at 00:41
[`getline`](http://www.cplusplus.com/reference/string/string/getline/) has another signature that takes a third paramter--a char-- that it uses as a delimiter. By default when you use the two parameter version, that delimiter is the newline character. There's probably a dupe somewhere... — scohe001, Apr 05 '18 at 00:41
Why not build on top of `ifstream`? Instead of storing it as a string? — , Apr 05 '18 at 00:53

score 0 · Answer 1 · answered Apr 05 '18 at 09:53

#include <iostream>
#include <vector>
#include <sstream>
#include <fstream>

using namespace std;

int main() {
    fstream myfile;
    myfile.open ("example.txt");
    if (myfile.is_open()) {
        string line;
        while (getline (myfile,line)) {
        vector<string> tokens;
        const string s =  line;
        char delim =' ';
        stringstream ss(s);
        string item;
        while (getline(ss, item, delim)) {
            tokens.push_back(item);
        }   
        getline (myfile,line);
        tokens.push_back(line);
        //Here you can create object using token[0], token[1], token[2] and can remove cout statements
        for(int i = 0; i < tokens.size(); i++) {
                cout << tokens[i] << endl;
        } 
        cout<<"=================\n";
     }
    }
    myfile.close();
    return 1;
}

I hope this helps. You can create the object as specified in the comments block and remove cout statements. They were added just to add clarification.

Read from text file and seperate by a delimiter

1 Answers1