C++ examples for Data Type:double
Double type Calculations
#include <iostream> #include <cmath> // For square root function using std::cout;//from ww w . j a va 2s .c o m using std::cin; using std::sqrt; int main() { const double fish_factor {2.0/0.5}; // Area per unit length of fish const double inches_per_foot {12.0}; const double pi {3.14159265}; double fish_count {}; // Number of fish double fish_length {}; // Average length of fish cout << "Enter the number of fish you want to keep: "; cin >> fish_count; cout << "Enter the average fish length in inches: "; cin >> fish_length; fish_length /=inches_per_foot; // Convert to feet double pond_area {fish_count * fish_length * fish_factor}; double pond_diameter {2.0 * sqrt(pond_area/pi)}; cout << "\nPond diameter required for " << fish_count << " fish is " << pond_diameter << " feet.\n"; }