LAST Name

FIRST Name


(1) Give C code to (a) ask the user how many numbers they want to
    enter, (b) ask the user for those integers, and (c) compute 
    and print the average of all the numbers entered.  Use 
    correct spelling (including upper/lower case) and punctuation.


(2) Random questions about C...

(2a) What are the different types that can be used to store integers 
     in C, and what are the differences between them?

(2b) What are the smallest and largest possible values of a signed
     char?  Of an unsigned char?  Of an int?

(2c) Evaluate each of the following:

     15 & 7 

     15 && 7 = 

     15 | 7 = 

     15 || 7 = 

     15 ^ 7 = 

     10 & 12 = 

     10 ^ 12 = 

     10 | 12 = 

     

(3) What does the code do?  For each, keep track of what the values of
    the variables are, and the final printed result.



(3c) Functions and pointers
void fun(int *x, int y, int z[]) {
  y = 7;
  x = z;
  *x = 8;
  z[1] = 9;
}


int main() {
  int v=0, *w, u[5] = {1, 2, 3, 4, 5}, t=6;
  w = u;
  fun(&v, t, u);
  
  printf("%i, %i, %i\n", v, *w, u[1]);
}



(3b) Pointers
int x = 23;
int *y = &x;
int *z = y;
x = 15;
*y = 10;
*z = 5;
printf("%i, %i, %i\n", x, *y, *z);


(3a) Arithmetic
int x = 32;
float f = 2.5;
x = x / 3;
f = f + x / 2;
f = f - x;
printf("%i\n%f\n", x, f);

// x: 
//
// f: 
//

// printed: 


(3b) Loops


(3c) Pointers