add: makefile

ex00/src/megaphone.cpp

@@ -0,0 +1,22 @@
+#include <iostream>
+#include <string>
+#include <cctype>
+
+int main(int argc, char *argv[]) {
+    if (argc < 2) {
+        std::cout << "* LOUD AND UNBEARABLE FEEDBACK NOISE *" << std::endl;
+        return 0;
+    }
+
+    std::string message;
+    for (int i = 1; i < argc; i++) {
+        message += argv[i];
+    }
+
+    for (int i = 0; message[i] != '\0'; i++) {
+        message[i] = std::toupper(message[i]);
+    }
+
+    std::cout << message << std::endl;
+    return 0;
+}