C++

// Program Loops demonstrates various looping structures.

#include

#include

using namespace std;

int main ()

{

ifstream inData;

int value;

inData.open("Loop.dat");

{ // while loop

int counter = 1;

int sum = 0;

while (counter

{

inData >> value;

sum = sum + value;

counter++;

}

cout

}

{ // do-while loop

int counter = 1;

int sum = 0;

do

{

inData >> value;

sum = sum + value;

counter++;

} while (counter

cout

}

{ // for loop

int sum = 0;

for (int counter = 1; counter

{

inData >> value;

sum = sum + value;

}

cout

}

return 0;

}

Check

10

20

30

40

10

20

30

40

10

20

30

40

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// Program Switches demonstrates the use of the Switch

// statement.

#include

using namespace std;

int main ()

{

char letter;

int first;

int second;

int answer;

cout

cin >> letter;

while (letter != 'Q')

Check

There are lots of symbols in this file: ..;;??

.,.,.,?:::

___________________________________________________________________

// Program CountMarks counts punctuation marks in a file.

#include

#include

using namespace std;

int main ()

{

ifstream inData;

char symbol;

int periodCt = 0;

int commaCt = 0;

int questionCt = 0;

int colonCt = 0;

int semicolonCt = 0;

inData.open("switch.dat");

/* FILL IN */

return 0;

}

Exercise 1: If file loop. dat contains the following values, what is printed? 10 20 30 40 10 20 30 40 10 20 30 40 Exercise 2: Which of these loops are pretest loops? Which are posttest loops? Examine program Switches and answer Exercises 3 and 4