Do variables need to be initialized?
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Write a program in "C" to calculate the root of a quadratic equation ax^2+bx+c=0, where the value of a,b & c are known.
what will be the output of this program........ main() { int a=2,b=4,c=6; printf("%d"); } why it gives the value of third variable.
What does void main return?
How the c program is executed?
What is realloc in c?
define string ?
2) Write a program that will help Air Traffic Control for an airport to view the sequence of flights ready for take-off. The airport can accommodate 10 flights waiting for take-off at any point in time. Each flight has a unique 3 digit numeric identifier.  Each time a flight takes-off, Air Traffic Control adds a flight to the waitlist. Each time a flight is added to the waitlist, the list of flights waiting to take-off must be displayed.  When a flight is cleared for take-off, Air Traffic Control removes the flight from the waitlist. Each time a flight takes-off, the list of flights waiting to take-off must be displayed.  Sequence of take-off is the sequence of addition to the waitlist
Explain is it better to bitshift a value than to multiply by 2?
How do I read the arrow keys? What about function keys?
How can you find out how much memory is available?
What is const volatile variable in c?
can we declare a function inside the structure? ex: struct book { int pages; float price; int library(int,float); }b; is the above declaration correct? as it has function declaration?