day01

2021/day01.cpp

@@ -0,0 +1,45 @@
+#include <iostream>
+#include <fstream>
+#include <vector>
+
+using namespace std;
+
+int main(int argc, char* argv[]) {
+    if (argc <= 1) {
+        cerr << "No input file was given!" << endl;
+        return 1;
+    }
+    ifstream input;
+    input.open(argv[1]);
+    if (input.is_open()) {
+        vector<int> array;
+        int x, y, count;
+        while (input >> x) {
+            array.push_back(x);
+        }
+
+        count = 0;
+        for (unsigned int i = 0; i < array.size() - 1; ++i) {
+            if (array[i + 1] > array[i]) {
+                count++;
+            }
+        }
+        cout << count << endl;
+
+        count = 0;
+        for (unsigned int i = 0; i < array.size() - 3; ++i) {
+            y = array[i] + array[i + 1] + array[i + 2];
+            x = array[i + 1] + array[i + 2] + array[i + 3];
+            if (x > y) {
+                count++;
+            }
+        }
+        cout << count << endl;
+    }
+    else {
+        cerr << "Unable to open file!";
+        return 1;
+    }
+    input.close();
+    return 0;
+}