Pujan Day 2 Part 1

Day 2/Pujan/main.cpp

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+#include<iostream>
+#include <stdlib.h>
+#include <fstream>
+
+int main()
+{
+    std::string filename("data.txt");
+    std::ifstream input{filename};
+    std::string line;
+    
+    int horizontal = 0;
+    int vertical  = 0;
+
+    if(!input.is_open())
+    {
+        std::cerr << "Couldn't read file: " << filename << "\n";
+        return 1;
+    }
+
+    while(std::getline(input,line))
+    {
+        std::string movement = line.substr(0, line.find(" "));
+        if (movement == "forward")
+        {
+            horizontal += stoi(line.substr(line.find(" ")));
+        }
+        else if (movement == "up")
+        {
+            vertical -= stoi(line.substr(line.find(" ")));
+        }
+        else
+        {
+            vertical += stoi(line.substr(line.find(" ")));
+        }
+    } 
+
+    std::cout << horizontal * vertical << std::endl;
+
+}