setprecision - C++ Reference: "// setprecision example
#include
#include
using namespace std;
int main () {
double f =3.14159;
cout << setprecision (5) << f << endl;
cout << setprecision (9) << f << endl;
cout << fixed;
cout << setprecision (5) << f << endl;
cout << setprecision (9) << f << endl;
return 0;
}"
