good questions of c with answer


Volatile modifier keyword questions in c programming language:
(q) What will be output of the following program?

void main()
{
volatile a=5;
a=~a+ ++a;
clrscr();
printf("%d",a);
getch();
}
Output: -1
Explanation: 
Volatile variable can be modifying by interrupt or other process in preprocessor. So in normal output will not affect.
Note. ~ is one’s complement operator

(q) What will be output of the following program?

void main()
{
volatile a=5;
a=~a+++a;
clrscr();
printf("%d",a);
getch();
}
Output: 0
Explanation: 
Volatile variable can be modifying by interrupt or other process in preprocessor. So in normal output will not affect.
a+++a means a++ + a.
Note. ~ is one’s complement operator.

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