Question

I have a struct that contains three lists and an integer as can be seen in the code below.

struct MainScreenState 
{
    std::list<char*> sessionId;
    std::list<char*> opposingUser;
    std::list<char*> currentMove;
    int totalScore;
    MainScreenState() {
        totalScore = 0;
    }
};
struct MainScreenState *state;

To initialise an int is possible using a constructor, but how do you initialise the list objects so that you avoid the compiler warning “warning C4700: uninitialized local variable ‘state'”.

Answer 1

std::list members are automatically initialized. The problem is with the variable state, which is un-initialized.

MainScreenState *state = NULL; //struct keyword not necessary in C++

or (per request)

MainScreenState *state = new MainScreenState;

or prefer using automatic-storage variables or a smart pointer.