day 5 part 1

AdventOfCode2018/5thDay/challenge1/main.cpp

@@ -0,0 +1,43 @@
+#include <iostream>
+#include <fstream>
+#include <string.h>
+
+int main(int argc, char** argv) {
+    if (argc != 2) return 0;
+
+    std::fstream input;
+    input.open(*(argv + 1));
+
+    std::string polymerString;
+    std::getline(input, polymerString);
+
+    while (!false) {
+        int numOfMods = 0;
+        std::string eh = "";
+        for (unsigned int i = 0; i < polymerString.length() - 1; i++) {
+            if (islower((char)polymerString[i])) {
+                if (toupper((char)polymerString[i]) == (char)polymerString[i+1]) {
+                    eh += polymerString.substr(0, i);
+                    eh += polymerString.substr(i + 2, polymerString.length());
+                    numOfMods++;
+                    break;
+                }
+            } 
+            if (isupper((char)polymerString[i])) {
+                if (tolower((char)polymerString[i]) == (char)polymerString[i+1]) {
+                    eh += polymerString.substr(0, i);
+                    eh += polymerString.substr(i + 2, polymerString.length());
+                    numOfMods++;
+                    break;
+                }
+            }
+        }
+        if (eh != "") {
+            polymerString = eh;
+        }
+        std::cout << "Current length: " <<polymerString.length() << std::endl;
+        if (numOfMods == 0) break;
+    }
+    std::cout << "Found polymers: " << polymerString << std::endl;
+    std::cout << "At length: " << polymerString.length() << std::endl;
+}