C / C++ / MFC

error C3861: 'srand_s': identifier not found
error C3861: 'rand_s': identifier not found

Quote:

how can I do to sid be as my SID struct, not as _SID windows struct ?

namespace MyLib {
   class A {
       int x;
       ...
   };
}

namespace MyProj {
   class A {
       int y;
       ...
   };
}

...

int main() {
    MyProj::A a1;  // defines an object of type class A from namespace MyProj
    MyLib::A  a2;  // defines an object of type class A from namespace MyLib

    a1.y = a2.y;   // don't need namespace resolution tags within function
}

// NOTE: namespaces must be declared at file scope, or in a header

namespace foo
{
    typedef struct
    {
        int bar;
    } FOOBAR;
};

namespace gaa
{
    typedef struct
    {
        char bar;
    } FOOBAR;
};

// the struct name FOOBAR may now be qualified to avoid ambiguity

int main
{
    foo::FOOBAR foobar;  // as declared in namespace foo
    foobar.bar = 10;     // the variable is int type
    
    gaa::FOOBAR gaabar;  // as declared in namespace gaa
    gaabar.bar = 'X';    // here is is char type
    
}

#define _SID _mySID
#define SID mySID
#define PISID myPISID

#undef _SID
#undef SID
#undef PISID

typedef struct_SID {
   ...
} SID, *PISID

 #ifdef SID
typedef struct {
   ...
}SID;
 #endif

int x;
 #ifdef x                    // only if preprocessor token 'x' exists
 #undef x                    // doesn't undefine int x 
 struct {                    // compiler error if branch taken, redifines type of x
   int i;
   double d;
 } x;
 #endif

 ...
    x myX;  //compiler error: typeof x unknown