1 files changed, 63 insertions, 0 deletions
diff --git a/src/lesson00.cpp b/src/lesson00.cpp
new file mode 100644
index 0000000..f31542d
--- /dev/null
+++ b/src/lesson00.cpp
@@ -0,0 +1,63 @@
+//============================================================================
+// Name        : arithmetic.cpp
+// Author      : Svenson Han Gothel and Sven Gothel
+// Version     : 0.1
+// Copyright   : MIT
+// Description : Applied artihmetic using C++
+//============================================================================
+
+#include <cstdio>
+#include <iostream>
+
+// function declaration
+int add(const int x, const int y);
+
+// function definition
+int add(const int x, const int y) {
+    return x + y;
+}
+
+// function declaration
+int double_value(const int x);
+
+int main(int argc, const char* argv[]) {
+    {
+        // entering scope-1, constructing `a` while initializing w/ `3`
+        int a=3;
+        {
+            // entering this scope-2, constructing `b` w/ `4`
+            int b=4;
+            int r = a + b;
+            (void)r; // avoid unused warnings
+            // leaving this scope-2, b will be destructed
+        }
+        // int r = a + b; // b is out of scope
+    }
+    {
+        // scope
+        for(int i=0; i<argc; i++) {
+            fprintf(stderr, "main.arg[%d]: %s\n", i, argv[i]);
+        }
+    }
+
+	int error_counter = 0;
+	{
+        const int res = add(1, 2);
+        if( 3 != res ) {
+            ++error_counter;
+        }
+	}
+	{
+	    const int res = double_value(1);
+	    if( 2 != res ) {
+	        ++error_counter;
+	    }
+	}
+	if( 0 == error_counter ) {
+		std::cout << "No error" << std::endl;
+		return 0;
+	} else {
+		std::cout << error_counter << " error(s)" << std::endl;
+		return 1;
+	}
+}