Advent2021/Day 1/Pujan/cpp/main.cpp

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

int main() 
{
    std::string filename("data.txt");
    std::ifstream input{filename};

    int prev = 0;
    int current = 0;
    int counter = 0;

    if(!input.is_open())
    {
        std::cerr << "Couldn't read file: " << filename << "\n";
        return 1;
    }
    
    for (std::string line; std::getline(input, line);) 
    {
        if (prev == 0)
        {
            prev = std::stoi(line);
            continue;
        }
        else
        {
            current = std::stoi(line);
            
            if (prev < current)
            {
                counter ++;
            }

            prev = current;
        }
    }
    std::cout << counter << std::endl;

}