Floating point control in a for loop : for loop « Operators statements « C++ Tutorial

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C++ Tutorial » Operators statements » for loop

3.15.14.Floating point control in a for loop

#include <iostream>

#include <iomanip>

using std::cout;

using std::endl;



int main() {

  const double pi = 3.14;

  cout << endl;



  for(double radius = .2 ; radius <= 3.0 ; radius += .2)

    cout << "radius = " << std::setw(6) << radius

         << "  area = " << std::setw(12) << pi * radius * radius

         << endl;

  return 0;

}

radius =    0.2  area =       0.1256
radius =    0.4  area =       0.5024
radius =    0.6  area =       1.1304
radius =    0.8  area =       2.0096
radius =      1  area =         3.14
radius =    1.2  area =       4.5216
radius =    1.4  area =       6.1544
radius =    1.6  area =       8.0384
radius =    1.8  area =      10.1736
radius =      2  area =        12.56
radius =    2.2  area =      15.1976
radius =    2.4  area =      18.0864
radius =    2.6  area =      21.2264
radius =    2.8  area =      24.6176

3.15.for loop
	3.15.1.	Simplest for loop statement
	3.15.2.	A conversion table of feet to meters
	3.15.3.	Use multiple statements in for loops
	3.15.4.	Display the alphabet: use char to control for loop
	3.15.5.	A negatively running for loop
	3.15.6.	Loop until a random number that is greater than 20,000.
	3.15.7.	A for loop with no increment
	3.15.8.	The body of a for loop can be empty
	3.15.9.	Declare loop control variable inside the for
	3.15.10.	Use nested for loops to find factors of numbers between 2 and 100
	3.15.11.	For loops with null statements
	3.15.12.	empty for loop statement
	3.15.13.	Compound interest calculations with for
	3.15.14.	Floating point control in a for loop
	3.15.15.	Generating multiplication tables

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