Loops:

1. What output does the follwing program fragment produce?

int i =1 ;
while (i <= 128){
  printf("%d\n ", i);
  i *=2;
}

2. Translate the above program fragment into a single for loop








3. Fix the error in the following program fragment


  if (n%2== 0);
  printf("n is even\n");


4. Extra: What is the output of the following program fragment:

int i,j;
  int counter =0;
  for (i =1 ;i <= 20; i++){
    for (j=1; j<=i; j++){
      counter++;
    }
  }
  printf ("Counter: %d\n", counter);

Could you do what this loop is doing with just one loop?

Functions:

5. The following function contains several errors. Fix them

double triangle_area(double base, height)
double product;
{
  product = base* height;
  return product /2;
}

6.) Write a function num_digits(n) that returns the number of digits in n ( an int)








7.) What will be the output of the following program

# include <stdio.h>

void swap (int a, int b);	// 1
     	       	      		// 2
int main(void)			// 3
{   				// 4
  int i =1, j =2;		// 5
  \\Point A   			// 6
  swap(i,j);			// 7
  printf("i = %d, j = %d\n", i , j);// 8
  \\ Point E  	      	       // 9
  return 0;		       // 10
} 	 		       // 11
			       // 12
void swap( int a , int b)      // 13
{    	       	       	       // 14
\\ Point B		       //15
int temp = a;		       // 16
\\ Point C 		       // 17
  a = b;     		       // 18
  b = temp;		       // 19
  \\ Point D		       // 20
}     			       // 21

8.) Do the stack diagrams for points A, B, C, D and E above


A:
Program Counter: 

The Stack	 Output
=========	 =========



--- main
   

B:
Program Counter: 

The Stack	 Output
=========	 =========


    

--- main
   


C:
Program Counter:

The Stack	 Output
=========	 =========



--- main


D:
Program Counter: 

The Stack	 Output
=========	 =========


    

--- main
   

E:
Program Counter: 

The Stack	 Output
=========	 =========


    

--- main