Sams Teach Yourself C in 21 Days

8. a.TRUE
   b.TRUE
   c.TRUE. Notice that there is a single equals sign, making the ifan assignment
   instead of a relation.
   d.TRUE


9. The following is one possible answer:
   if( age < 21 )
   printf( “You are not an adult” );
   else if( age >= 65 )
   printf( “You are a senior citizen!”);
   else
   printf( “You are an adult” );


10. This program has four problems. The first is on line 3. The assignment statement
    should end with a semicolon, not a colon. The second problem is the semicolon at
    the end of the ifstatement on line 6. The third problem is a common one: The
    assignment operator (=) is used rather than the relational operator (==) in the if
    statement. The final problem is the word otherwiseon line 8. This should be else.
    Here is the corrected code:
    / a program with problems... /
    #include <stdio.h>
    int x = 1;
    int main( void )
    {
    if( x == 1)
    printf(“ x equals 1” );
    else
    printf(“ x does not equal 1”);
    return 0;
    }

Answers for Day 5

Quiz

1. Yes! (Well, OK, this is a trick question, but you had better answer “yes” if you
   want to become a good C programmer.)


2. Structured programming takes a complex programming problem and breaks it into
   a number of simpler tasks that are easier to handle one at a time.


3. After you’ve broken your program into a number of simpler tasks, you can write a
   function to perform each task.

836 Appendix F

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