(C) Is the following a legitimate C program? If it is what does it do? If not, why not?

Question

(Correct it and in your words indicate what it does). (15 points).

#incldue < stdio.h>

float  main (int)

 { int x;

   printf(“\n\n\n”);

   print(“%c\n”, “ this program may do something”)

    scanf( “%d\n”, What is it? );

    scan(“%c “ ,  x);

   printit(“ \n”);

   printf(“\n”)

    

}

Answer 1

COMPILER ERRORS:

include is misspelled

main must return int

main takes only ZERO or arguments:

either do:

int main ( int argc, char ** argv)

or

int main()

line 9: you have print instead of printf

and that same statement is missing the semicolon;

line 11: What is it? should be inside double quotes

otherwise use a variable there instead

line 13: you have scan instead of scanf

line 15: you have printit instead of printf

That should bring this source code into a

compilable state

Now for the run-time bugs...

line 7 is ok, as it just prints 3 newlines

line 9 will output and behave unpredicatably because

you are asking printf to cram the entire string

"this program may do something" into a single

character

the same is true for line 11: you are trying to

format the string "What is it?" as a decimal, so

unpredictable output and behavior results

because you are passing a bogus address to scanf in

line 13, the result is unpredictable. Program MAY

crash. If it doesn't YOU'RE LUCKY!

The program mercifully ends with two new line

in lines 15 onwards