init

1 files changed, 50 insertions, 0 deletions

diff --git a/day02/day02.cpp b/day02/day02.cpp
new file mode 100644
index 0000000..dccb44a
--- /dev/null
+++ b/day02/day02.cpp
@@ -0,0 +1,50 @@
+#include <iostream>
+
+int main (int argc, char *argv[]) {
+	if (argc != 2) return 1;
+	
+	int depth = 0;
+   	int	forward = 0;
+
+	int aim = 0;
+	int aim_depth = 0;
+
+	FILE *f = fopen(argv[1], "r");
+	char c = fgetc(f); 
+	std::string command;
+	while (c != EOF) {
+		if (c == '\n') {
+			auto token_space = command.find(" ");
+			if (token_space != std::string::npos) {
+				std::string op = command.substr(0, token_space);
+				int amt = std::stoi(command.substr(token_space+1));
+				if (op == "forward") {
+					forward += amt;
+					aim_depth += aim * amt;
+				}
+				if (op == "down") {
+					depth += amt;
+					aim += amt;
+				}
+				if (op == "up") {
+					depth -= amt;
+					aim -= amt;
+				}
+			} 
+			command = "";
+		}
+		else command += c;
+		c = fgetc(f);
+	}
+
+	std::cout << "depth " << depth << ", "
+		<< "forward " << forward << ", "
+		<< "product " << depth * forward << std::endl;
+
+	std::cout << "using aim: depth " << aim_depth << ", "
+		<< "forward " << forward << ", "
+		<< "aim " << aim << ", "
+		<< "product " << aim_depth * forward << std::endl;
+
+	return 0;
+}