Help with objects in C++

I have the code

class ogre
{
    public:
        int health;
        bool isalive;
        string name;
};

int fight()
{
    cout << "You're now fighting an ogre!" << endl;

    ogre ogre;
    player player;
    int ogredamage;
    int playerdamage;

    srand(time(NULL));

    ogre.name = "Fernando Fleshcarver";
    ogre.health = 100;
    ogre.isalive = true;

    player.health = 10000000;
    player.isalive = true;

    while(ogre.isalive = true)
    {
        ogredamage = rand() % 20;
        cout << ogre.name << " deals " << ogredamage << " damage to you!" << endl;
        player.health = player.health - ogredamage;
        cout << "You have " << player.health << " health left." << endl << endl;

        playerdamage = rand() % 20;
        cout << "You deal " << playerdamage << " damage to " << ogre.name << endl;
        ogre.health = ogre.health - playerdamage;
        cout << ogre.name << " has " << ogre.health << " health left." << endl;

        ogre.isalive = false;

    }

    return 0;
}

whi开发者_运维问答ch compiles fine, however, when I try to set "ogre.isalive" (at the very bottom of the code) to false, nothing happens and the code keeps looping. What am I doing wrong?

ogre.isalive = true 

is an assignment! The while loop will always run because the result of the assigment is always true. You need == to test for equality. Better yet, just use

while(ogre.isalive)

Your while condition is an assignment and then a check of ogre.isalive, which is of course true because you just assigned it:

while(ogre.isalive = true)

You want to check for equality:

while(ogre.isalive == true)

Or better yet, since the variable is already a boolean:

while(ogre.isalive)

Use

                     vv
 while( ogre.isalive == true )

Or just

 while( ogre.isalive )

EDIT: Using

                     v
 while( ogre.isalive = true )

just assigns true on each step of the loop, this way your while will never stop.

You have assignment (ogre.isalive = true) in the loop condition. It should be:

while(ogre.isalive)
...