Sams Teach Yourself C in 21 Days

Answers 863

F

return 0;

}

void print_letter2(void)

{

char letter2 = ‘=’;

int ctr; /* this is a local variable */

/* it is different from ctr in main() */

for( ctr = 0; ctr < 2; ctr++ )

printf( “%c”, letter2 );

}

Answers for Day 13

Quiz

1. Never. (Unless you are very careful.)


2. When a breakstatement is encountered, execution immediately exits the for,
   do...while,orwhileloop that contains the break. When a continuestatement is
   encountered, the next iteration of the enclosing loop begins immediately.


3. An infinite loop executes forever. You create one by writing a for,do...while,or
   whileloop with a test condition that is always true.


4. Execution terminates when the program reaches the end of main()or the exit()
   function is called.


5. The expression in a switchstatement can evaluate to a long,int,orcharvalue.


6. The defaultstatement is a case in a switchstatement. When the expression in the
   switchstatement evaluates to a value that doesn’t have a matching case, control
   goes to the default case.


7. The exit()function causes the program to end. A value can be passed to the
   exit()function. This value is returned to the operating system.


8. The system()function executes a command at the operating system level.

Exercises

1.continue;

2.break;

3. For a DOS system, the answer would be
   system(“dir”);


4. This code fragment is correct. You don’t need a breakstatement after the printf()
   for‘N’, because the switchstatement ends anyway.

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