add src-space c/cpp

space/src-cpp/src/main.cpp

@@ -0,0 +1,17 @@
+#include <iostream>
+
+int fib(int n) {
+    if (n == 0 || n == 1) {
+        return n;
+    }
+    return fib(n - 1) + fib(n - 2);
+}
+
+int main() {
+    int temp;
+    std::cin >> temp;
+
+    std::cout << fib(temp) << std::endl;
+
+    return 0;
+}