Convert a double to fixed decimal point in C++
c++, decimal, fixed-point
Solution
Assuming I'm remembering my format strings correctly,
printf("%.*f", (int)precision, (double)number);
Problem
I have a double variable in C++ and want to print it out to the screen as a fixed decimal point number. Basically I want to know how to write a function that takes a double and a number of decimal places and prints out the number to that number of decimal places, zero padding if necessary. For example: ``` convert(1.235, 2) ``` would print out ``` 1.24 ``` and ``` convert(1, 3) ``` would print out ``` 1.000 ``` so the function works as ``` convert(number as double, number of decimal places) ``` and simply prints out the required value to standard output (cout). Does anyone know how to do this? Thanks in advance.