Added simple implementation of hex/octal conversion

experiments/call_library/main.c

@@ -0,0 +1,19 @@
+#include <stdio.h>
+
+#include "test.h"
+
+
+int main()
+{
+    printf("Going to print test value from TestLibrary\n");
+
+    const double test_value = TestLibrary_test_value();
+
+    printf("%.0f\n", test_value);
+
+    const double new_test_value = TestLibrary_multiply_by_one_point_five(test_value);
+
+    printf("Multiplied by 1.5: %.2f\n", new_test_value);
+
+    return 0;
+}