Ace Test Series: Programming - Basic Concept

Question

They have given answer B , but after running this program getting runtime error. Please explain

Comments

char a[] = '\0' is syntactically incorrect. It gives a compilation error with gcc.

Answer 1

in this question, 

char a[]='\0' -----> line giving error why because a is a character array not a character if you put \0 in double quotes look like as "\0" it will ok otherwise put \0 in { } look like as { '\0' }

if the line is corrected then the output should be "The string is not empty"   why because printf always return how many characters it printed on stdout, note that printf never print null character. therefore if(printf("%s",a)) equivalent to if(0) ===> condition fails