How can we print some specific number after point in floating number ? I want output 3.00

Question

float a;
cin>>a;
cout<<a;
input : 3
output : 3.000000
in c we have used
printf("%.2f",a);
Here what we need to do?

Answer 1

I C++ you can use the function std::setprecision from the <iomanip> library: http://www.cplusplus.com/reference/iomanip/setprecision/