I need to read a .dat file which looks like this:
Atask1 Atask2 Atask3 Atask4 Atask5
Btask1 Btask2 Btask3 Btask4 Btask5
Ctask1 Ctask2 Ctask3 Ctask4 Ctask5
Dtask1 Dtask2 Dtask3 Dtask4 Dtask5
and i need to be able to output information like this:
cout << line(3) << endl; // required output shown below
>>Ctask1 Ctask2 Ctask3 Ctask4 Ctask5
cout << line(2)(4) << endl; // required output shown below
>>Btask4
I don't know how to read 1 line and split it into an array of 5 different strings.
I'd ideally like to have the whole .dat file converted into a vector or a list or some kind of matrix/array structure for easy reference
any simple code or solutions for this??
PLEASE HELP?!?!?!? :-)
EDIT:
vector<string> dutyVec[5];
dut1.open(dutyFILE);
if( !dut1.is_open() ){
cout << "Can't open file " << dutyFILE << endl;
exit(1);
}
if(dut1.eof()){
cout << "Empty file - no duties" << endl;
exit(1);
}
while ( !dut1.eof()){
int count = 0;
getline(dut1, dutyVec[count]);
count++;
}
Your problem addresses a number of issues, all of which I will attempt to answer in one go. So, forgive the length of this post.
#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <fstream>
int main(int argc, char argv[]){
std::vector <std::string> v;//just a temporary string vector to store each line
std::ifstream ifile;
ifile.open("C://sample.txt");//this is the location of your text file (windows)
//check to see that the file was opened correctly
if(ifile.is_open()) {
//while the end of file character has not been read, do the following:
while(!ifile.eof()) {
std::string temp;//just a temporary string
getline(ifile, temp);//this gets all the text up to the newline character
v.push_back(temp);//add the line to the temporary string vector
}
ifile.close();//close the file
}
//this is the vector that will contain all the tokens that
//can be accessed via tokens[line-number][[position-number]
std::vector < std::vector<std::string> > tokens(v.size());//initialize it to be the size of the temporary string vector
//iterate over the tokens vector and fill it with data
for (int i=0; i<v.size(); i++) {
//tokenize the string here:
//by using an input stringstream
//see here: http://stackoverflow.com/questions/5167625/splitting-a-c-stdstring-using-tokens-e-g
std::istringstream f(v[i].c_str());
std::string temp;
while(std::getline(f, temp, ' ')) {
tokens[i].push_back(temp);//now tokens is completely filled with all the information from the file
}
}
//at this point, the tokens vector has been filled with the information
//now you can actually use it like you wanted:
//tokens[line-number][[position-number]
//let's test it below:
//let's see that the information is correct
for (int i=0; i<tokens.size(); i++) {
for(int j=0; j<tokens[i].size(); j++) {
std::cout << tokens[i][j] << ' ';
}
std::cout << std::endl;
}
system("pause");//only true if you use windows. (shudder)
return 0;
}
Note, I did not use iterators, which would have been beneficial here. But, that's something I think you can attempt for yourself.