1 files changed, 24 insertions, 0 deletions
diff --git a/graphs/cpp/exist_functor/example.cc b/graphs/cpp/exist_functor/example.cc
new file mode 100644
index 0000000..d580f7b
--- /dev/null
+++ b/graphs/cpp/exist_functor/example.cc
@@ -0,0 +1,24 @@
+#include <iostream>
+
+#include "exist.hh"
+
+int main()
+{
+    Exist<int> exist_int;
+    Exist<std::string> exist_str;
+
+    // Test with integers
+    std::cout << std::boolalpha;
+    std::cout << exist_int(1) << std::endl; // Prints false
+    std::cout << exist_int(2) << std::endl; // Prints false
+    std::cout << exist_int(1) << std::endl; // Prints true
+    std::cout << exist_int(3) << std::endl; // Prints false
+
+    // Test with strings
+    std::cout << exist_str(std::string("Hello")) << std::endl; // Prints false
+    std::cout << exist_str(std::string("World")) << std::endl; // Prints false
+    std::cout << exist_str(std::string("Hello")) << std::endl; // Prints true
+    std::cout << exist_str(std::string("C++")) << std::endl; // Prints false
+
+    return 0;
+}