Study questions covering C Chapters 1-5

Question 1

What is wrong with the following code? 
 #include  /*This is a directive line*/ 
 main /* This function will be automatically called*/ 
 (void/* I do not have arguments to pass*/) 
 { /* This is the first line in the program 
 /* I am so excited to write this program */ 
 printf(“Hello world\n”)} 
 /* Finally I am done with it 
 /* But I am not sure why it does not work :-( */ 
 }

Answer 1

There is no semi colon after the call of the printf function statement.

There is an extra } after the printf statement.

Question 2

Which of the following are legal C identifier?
100_bottles, _100bootles, one-hundred-bottles, one_hundred_bottles,
one_hundred_bottles, one__hundred__bottles, one__hundred__bottles__, If, main,
Printf, and while.

Answer 2

_100_bootles, 
one_hundred_bottles, 
one_hundred_bottles_, 
one\_\_hundred\_\_bottles, 
one\_\_hundred\_\_bottles\_\_, 
If, 
main, 
Printf,