Why do I see strange values when I print uninitialized variables?

Asked 2010-11-23T19:20:26.633

In the following code, the variable has no initial value and printed this variable.

int var;
cout << var << endl;

output : 2514932

double var;
cout << var << endl;

output : 1.23769e-307

I don't understand these output numbers. Can any one explain this to me?

c++ variables c++-faq initialization

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1 Answer

When you do:

int var;

You are only declaring an integer named var. You do not initialize it with a value, so in whatever location var is, will be garbage data.

int var = 5;

Would declare var and initialize it to 5.

answered 2010-11-23T19:23:15.960