Hey, I have to read numbers from a text file. Heres an example input:
6 8
1 2 10
1 3 9
2 3 7
2 4 2
3 5 5
4 5 3
4 6 8
5 6 4
The parser I coded works fine in NetBeans and Dev c++, however we are required to run it on a linux terminal also.
Heres how the last column looks after I read it in from the text file in linux:
10
7
2
5
3
8
4
it seems to skip the 9. Heres my code for reading the info from the text file "input.txt"
The first line of the text file just tells me how many vertices (nV) and edges (nE) I have.Code://first I get all the lines and add them to a string vector ifstream myFile("input.txt"); if (myFile.is_open()) { while (!myFile.eof()) { getline(myFile,line); inputLines.push_back(line); } myFile.close(); } //this while loop will parse all the info from the text file while (lineNumber < inputLines.size()) { //converts the read in line to a c sting cstrInput = new char[line.size()+1]; strcpy(cstrInput,inputLines[lineNumber].c_str()); //parse the line, looking for a space or " " parser = strtok(cstrInput," "); while (parser != NULL) { //all input is integers, so convert the num to an integer num = atoi(parser); if (infoType == 1) { //infoType is one, and line number is 0, so I'm parsing nV if (lineNumber == 0) { //create a new set with nV amount theSet = new dis_set(num); } //u is the first column //not the first line, so info is u values else { theEdge.u = num; } } else if (infoType == 2) { //infoType is two, and line number is 0, so I'm parsing nE if (lineNumber == 0) { //create a new heap with nE amount theHeap = new min_heap(num); } else { //v is the second coloumn //not the first line, so info is v value theEdge.v = num; } } //if infoType is 3, than I'm reading a cost value. else if (infoType == 3) { if (lineNumber == 0) ; else //cost is the third coloumn theEdge.cost = num; } parser = strtok(NULL," "); infoType++; } //insert the newly created edge into the heap theHeap->insert(theEdge); lineNumber++; infoType = 1; // set infoType to 1 }
I create a loop that goes through the string vector. Each loop it creates an Edge (an edge is a struct made up of 3 ints which are two vertices and a cost). I set the first value to Edge.u, I set the second value to Edge.v, and i set the third Edge.cost.
I then insert the edge into a min-heap. But, like I stated above the parse code works in NetBeans and Dev c++, but it doesnt work properly in a linux terminal.
