First version

tests/ide_samples/sum.cpp

@@ -0,0 +1,12 @@
+#include <iostream>
+#include <print>
+#if __cplusplus < 202302L
+#error C++23 is required.
+#endif
+int main() {
+    std::println("C++23 | GCC {}", __VERSION__);
+    std::cout << "Input two integers: " << std::flush;
+    long long a, b;
+    if (!(std::cin >> a >> b)) return 1;
+    std::println("SUM = {}", a + b);
+}