Section 5.8 Check Point Questions7 questions

5.8.1

Do the following two loops result in the same value in sum?

(a)
for (int i = 0; i < 10; ++i) 
{  
  sum += i;
}

(b)
for (int i = 0; i < 10; i++) 
{  
  sum += i;
}

5.8.2

What are the three parts of a for loop control? Write a for loop that prints the numbers from 1 to 100.

5.8.3

Suppose the input is 2 3 4 5 0. What is the output of the following code?

#include <iostream>
using namespace std;

int main()
{
  int number, sum = 0, count;

  for (count = 0; count < 5; count++)
  {
    cin >> number;
    sum += number;
  }

  cout << "sum is " << sum << endl;
  cout << "count is " << count << endl;

  return 0;
}

5.8.4

What does the following statement do?

for ( ; ; ) 
{
  // Do something
}

5.8.5

If a variable is declared in a for loop control, can it be used after the loop exits?

5.8.6

Convert the following for loop statement to a while loop and to a do-while loop:

long sum = 0;
for (int i = 0; i <= 1000; i++)
  sum = sum + i;

5.8.7

Count the number of iterations in the following loops.

(a)
int count = 0;
while (count < n) 
{
  count++;
}

(b)
for (int count = 0; count <= n; count++) 
{
}

(c)
int count = 5;
while (count < n) 
{
  count++;
}

(d)
int count = 5;
while (count < n) 
{
  count = count + 3;
}