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






  1. C++ Tutorial
  2. Operators statements
  3. 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