Difference between various initializers in C++

manpreet Best Answer 2 years ago

I've only recently started learning C++ as part of my 10th Grade syllabus, and am only aware of the basics, thus simple answers (if possible) will be appreciated. I'm rather confused between initialization and assignment.

//Case 1
int a=5; //This is initialization
a=6; //This is assignment

From what I've understood, a variable is initialized when you give it a value to hold while declaring it. Changing this later in the code will be an assignment. Right?

What about :

//Case 2
int b;
{
//Block of code which does not call variable b
.
.
.
//End of block
}
b=6; // Is this initialization as well?

While 'b' is uninitialized when we declare, we later assign the value '6'. Can we say the 'b' is initialized now? Or are the terms initialized and uninitialized not applicable to 'b' anymore?

I read the an uninitialized variable holds "garbage values" till it isn't initialized. What exactly are "garbage values"?

What is the difference between the following initializers : '()', '{}', and '='?

manpreet 2 years ago

int b; 

int b(1);

int b[] = {1, 3, 5, 7};