Adventofcode/Day2part2.cpp at main · Saketh1100/Adventofcode · GitHub

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#include <iostream>
#include <fstream>
#include <vector>
#include<string>
#include<iomanip>
#include<sstream>//for converting string digits to int

using namespace std;
int Separatewords(string str)//function for finding whether password is valid or not
{
    vector<string>v;//this vector is to store words in a give line

    int j=0;
    string word = "";

    int l=str.length();

    for (int i=0;i<l;i++)//Goes through all charecters and separates word
    {
        string x;
        x=str[i];
        if ((x == " "||x=="-")&&i != l-1)
        {
            if(word=="")
            {
                continue;
            }
            else{
                v.push_back(word);
            }


            word = "";
        }
        else if(x==":")
        {

            if (word == "")
            {
                continue;
            }
            else
            {
                v.push_back(word);
            }
            word="";
        }


        else if(i==l-1)
        {
            word=word+x;//making a

            if (word == "")
            {
                continue;
            }
            else
            {
                v.push_back(word);
            }
        }
        else
        {
            word = word + x;
        }
    }


    stringstream sss(v[0]);//for converting '15' to 15 (example)
    int x=0;
    sss>>x;
    stringstream ss(v[1]);
    int z=0;
    ss>>z;
    if ((v[3][x - 1] == v[2][0] && v[3][z - 1] != v[2][0]) || (v[3][x - 1] != v[2][0] && v[3][z - 1] == v[2][0])) //checking x-1 and z-1 position in the last string with required charecter(i.e v[2][0])
    {
        return 1;//this returned value stored in a vector v1 in main function
    }
    else
    {
        return 0;
    }


}

int main()
{
    string p="";//to store a line from a given data
    vector<int>v1;


    ifstream indata;//for reading data from file
    indata.open("Day2 data");
    if(indata.fail())
    {
        cout<<"something went wrong"<<endl;//for any kind of error messages
    }


    while(indata)
    {


        getline(indata,p);//taking a line at a time and checking its validity

        int x=Separatewords(p);//returns either 0 or 1 based on its validity

        if(x==1)
        {
            v1.push_back(1);//main reason to add 1 to a vector is to easily count no of valid passwords
        }

    }
    cout<<v1.size()<<endl;


    return 0;


}