I want to write a function that outputs something to a ostream that's passed in, and return the stream, like this:

std::ostream& MyPrint(int val, std::ostream* out) {
  *out << val;
  return *out;
}

int main(int argc, char** argv){
    std::cout << "Value: " << MyPrint(12, &std::cout) << std::endl;
    return 0;
}

It would be convenient to print the value like this and embed the function call in the output operator chain, like I did in main().

It doesn't work, however, and prints this:

$ ./a.out
12Value: 0x6013a8

The desired output would be this:

Value: 12

How can I fix this? Do I have to define an operator<< instead?

UPDATE: Clarified what the desired output would be.

UPDATE2: Some people didn't understand why I would print a number like that, using a function instead of printing it directly. This is a simplified example, and in reality the function prints a complex object rather than an int.