Exercises 3

1.

#include <iostream>

#include <iomanip>

int

main()

{

int num2;

num2 = 1234;

//demonstration of setw

cout << "A width of 7" << '|' << setw(7)

<< num2 << '|' << endl;

cout << "A width of 2" << '|' << setw(2)

<< num2 << '|' << endl;

cout << "A width of 5 " << '|' << setw(5)

<< num2 << '|' << endl;

cout << "No width specified " << '|' << num2 << '|' << endl;

return 0;

}

2.

#include <iostream>

#include <iomanip>

int

main()

{

float num1;

//default printout of float numbers.

num1 = 123456;

cout << "The value of num1 is: " << num1 << endl;

num1 = 1234567;

cout << "The value of num1 is: " << num1 << endl;

//demonstration of setprecision

cout <<"A precision of 3 " << setprecision(3) << num1 << endl;

cout << "A precision of 2 " <<setprecision(2) << num1 << endl;

cout << "No precision specified after precision 2 specified "

<< num1 << endl;

return 0;

}

3.

#include <iostream>

#include <iomanip>

int main()

{

float num1;

int num2;

//default printout of float numbers.

num1 = 123456;

cout << "The value of num1 is: " << num1 << endl;

num1 = 1234567;

cout << "The value of num1 is: " << num1 << endl;

//demonstration of format flag showpoint

cout << "demo of showpoint" << endl;

num1 = 6;

cout << "Before setiosflags(ios::showpoint)"<< endl;

cout << num1 << endl;

cout << setiosflags(ios::showpoint);

cout << "After setiosflags(ios::showpoint)" << endl;

cout << num1 << endl;

num1 = 24.5;

cout << num1 << endl;

num1 = 1234567;

cout << num1 << endl;

return 0;

}

4.

#include <iostream>

#include <iomanip>

int main()

{

float num1;

//default printout of float numbers.

num1 = 123456;

cout << "The value of num1 is: " << num1 << endl;

num1 = 1234567;

cout << "The value of num1 is: " << num1 << endl;

cout << "demo of fixed" << endl;

cout << setiosflags(ios::fixed);

cout << num1 << endl;

num1 = 24.5;

cout << num1 << endl;

num1 = 6;

cout << num1 << endl;

num1 = 123456;

cout << num1 << endl;

return 0;

}