A.Modify the Sample Program 3 to display the following output B. Why and when do we use the #define directive? C. Why and when do we use the #include directive? D. What does void main(void) mean? E....

B. Why and when do we use the #define directive? C. Why and when do we use the #include directive? D. What does void main(void) mean? E. Distinguish between the following pairs:

(a) main( ) and void main(void)

(b) int main( ) and void main( )

F. Why do we need to use comments in programs? G. Why is the look of a program is important? H. Where are blank spaces permitted in a C program?