Default value confusion

#1

sir if i declare a variable but i don’t assign any value to it so it will have garbage value or 0 value
sir i printed a variable after declaring it

it prints 0 only
whereas shouldn’t it be garbage value?

#2

hey Yatin, it depends upon compiler to compiler. In latest compiler it mostly gives 0 for single variable but if you declare an array that it contains garbage values.

#3

ok sir and what happens for the pointer
if i do the same
i declare it and print it without storing any address
int *p;
cout<<p;
it gave zero in all data types but nothing in char *

#4

hey @yatin, consder the below explanation,

char ch;
cout<<ch; //no output

when you print char pointer using cout, it always gives to content of char variable it pointing to instead of address due to operator overloading.
char ch=‘A’;
char* ptr=&ch;
cout<<ptr; //output=A

So an empty character pointer will give no answer as there is no content available for it to point.

#5

sir in int and float pointer case also there is nothing to point ,but they do print 0 value

#6

Hey @yatin, yes int and float will gave you 0 as there is nothing available for them to point
Remember, It is good programming habit to initialise the pointer with NULL at the time of declaration.