@@ -19,6 +19,9 @@ namespace

 class impl : public stdlib_ifc

 {

 public:

+    void srand(unsigned int seed) const override {

+        ::srand(seed);

+    }

     int rand() const override

     {

         return ::rand();

@@ -17,6 +17,8 @@

 class stdlib_ifc

 {

 public:

+    virtual void srand(unsigned int seed) const {

+    }

     virtual int rand() const

     {

         return 0;

@@ -32,6 +34,9 @@ private:

 public:

     stdlib (delegate delegate = std::make_shared<stdlib_ifc>()) : delegate_

         (delegate) {}

+    void srand(unsigned int seed) const {

+        return delegate_->srand(seed);

+    }

     int rand() const

     {

         return delegate_->rand();