online compiler and debugger for c/c++

/****************************************************************************** Online Java Compiler. Code, Compile, Run and Debug java program online. Write your code in this editor and press "Run" button to execute it. *******************************************************************************/ import java.io.*; public class Main { public static void main(String[] args){ DataManager.main(args); } } class DataManager { public static void main(String[] args) { DataManager dataManager = new DataManager(); dataManager.init(); } public void init() { Row[] dummyDataSet = new Row[13486]; //dummy array char[] dummyCharArray = new char[13486]; //dummy char array for(int i = 0; i < dummyCharArray.length; i++){ dummyCharArray[i] = '5'; } dummyDataSet[1] = new Row(dummyCharArray); // dummy initializatiol of Row index // manipulateData(dummyDataSet); Row dataSet[] = new Row[13486]; // number of rows from data try ( FileReader fr = new FileReader("SmallAreaIncomePovertyEstData.txt")) // this is used to read the data from the .txt file { int c; int i = 0; int j = 0; char rowInputs[] = new char [130]; while((c = fr.read()) != -1) { rowInputs[i] = (char) c; i++; if ( c == 10) { // `32` is blank space, '10' is new line dataSet[j] = new Row(rowInputs); j++; i = 0; } } } catch (IOException e) { System.out.println(e + "occured"); } // manipulate the data this.manipulateData(dataSet); // write the data } public Row[] manipulateData(Row[] dataset) { Row[] manipulatedData = new Row[57]; char rowInputs[] = new char [130]; try ( BufferedWriter bw = new BufferedWriter (new FileWriter("SmallAreaIncomePovertyEstDataManipulated.txt")) ) { int stateId = 1; // starting point id int statePopulation = 0; int stateChildPopulation = 0; int stateChildPovertyPopulation = 0; for (int i = 0; i < dataset.length; i++) { dataset[i] = new Row(rowInputs,stateId, statePopulation, stateChildPopulation, stateChildPovertyPopulation); if (dataset[i].id == stateId) { statePopulation += dataset[i].population; stateChildPopulation += dataset[i].childPopulation; stateChildPovertyPopulation += dataset[i].childPovertyPopulation; } else { double stateChildPovertyPopulationPercentage = 0; if (stateChildPopulation != 0) { stateChildPovertyPopulationPercentage = (double) stateChildPovertyPopulation/stateChildPopulation*100; int z = 12; } else { stateChildPovertyPopulationPercentage = 0; } bw.append(stateId + " \t " + statePopulation + " \t " + stateChildPopulation + " \t " + stateChildPovertyPopulation + " \t " + stateChildPovertyPopulationPercentage + "\n"); statePopulation = 0; stateChildPopulation = 0; stateChildPovertyPopulation = 0; i--; stateId++; } } } catch (IOException e) { System.out.println("I/O Error: " + e); } int x = 12; return manipulatedData; }; class Row { private char[] contents; private int id; private int population; private int childPopulation; // Pop of children 5 to 17 private int childPovertyPopulation; // this is the estimated number of children in poverty private double percentageChildPovertyPopulation; // in Poverty Related to the Householder //dummy constructor public Row(char[] contents, int id, int population, int childPopulation, int childPovertyPopulation){ this.contents = contents; this.id = id; this.population = population; this.childPopulation = childPopulation; this.childPovertyPopulation = childPovertyPopulation; this.percentageChildPovertyPopulation = percentageChildPovertyPopulation; } Row (char[] input) { contents = input; char [] stateIdPlaceholder = java.util.Arrays.copyOfRange(contents, 0, 2); // state id [char range] id = Integer.parseInt(new String(stateIdPlaceholder).trim()); char[] tPopPlaceholder = java.util.Arrays.copyOfRange(contents, 83, 90); // total poulation [char range] population = Integer.parseInt(new String(tPopPlaceholder).trim()); char[] cPopPlaceholder = java.util.Arrays.copyOfRange(contents, 92, 99); // child population [char range] childPopulation = Integer.parseInt(new String(cPopPlaceholder).trim()); char[] cPPopPlaceholder = java.util.Arrays.copyOfRange(contents, 101, 108); // child poverty population [char range] try{ childPovertyPopulation = Integer.parseInt(new String(cPPopPlaceholder).trim()); } catch (NumberFormatException e) { System.out.println(e); } } } }