#include <iostream> #include <iomanip> using namespace std; int main() { double myNum = 3.14159; cout << fixed << setprecision(2) << myNum << "\n"; // 3.14 cout << fixed << setprecision(3) << myNum << "\n"; // 3.142 (rounded up) cout << fixed << setprecision(0) << myNum << "\n"; // 3 return 0; }