test07.cpp

chronolaw · chronolaw · commit bec64e1d48ad · 2020-02-22T15:04:05.000+08:00
diff --git a/section2/test07.cpp b/section2/test07.cpp
@@ -0,0 +1,30 @@
+// Copyright (c) 2020 by Chrono
+//
+// g++ test07.cpp -std=c++11 -o a.out;./a.out
+// g++ test07.cpp -std=c++14 -o a.out;./a.out
+// g++ test07.cpp -std=c++14 -I../common -o a.out;./a.out
+
+#include <iostream>
+
+
+constexpr
+int fib(int n)
+{
+    if (n == 0 || n == 1) {
+        return 1;
+    }
+
+    return fib(n - 1) + fib(n - 2);
+}
+
+int main()
+{
+    using namespace std;
+
+    constexpr
+    int fib5 = fib(5);
+
+    cout << fib5 << endl;
+
+    cout << "const demo" << endl;
+}
