C Primer Plus®, Third Edition

Review Questions

1. Assume all variables are of type int. Find the value of each of the following variables:

   1. x = (2 + 3) * 6;

   2. x = (12 + 6)/2*3;

   3. y = x = (2 + 3)/4;

   4. y = 3 + 2*(x = 7/2);

2. Assume all variables are of type int. Find the value of each of the following variables:

   1. x = (int) 3.8 + 3.3;

   2. x = (2 + 3) * 10.5;

   3. x = 3 / 5 * 22.0;

   4. x = 22.0 * 3 / 5;

3. You suspect that there are some errors in the next program. Can you find them?

   int main(void)
   {
     int i = 1,
     float n;
     printf("Watch out! Here come a bunch of fractions!\n");
     while (i < 30)
       n = 1/i;
       printf(" %f", n);
     printf("That's all, folks!\n");
     return;
   }
   

4. Here's a first attempt at making min_sec interactive, but the program is not satisfactory. Why not? How can it be improved?

    #include <stdio.h> #define S_TO_M 60 ...