How to approximate the last decimal.

Question

Please I'm running a program that requires the last digit of a decimal to be approximated, please how do I do this?

For example:

If variable n = 14.445;
Output should be 14.45;

Answer 1

Since printf() is a C function, the C++ version of that is

std::cout.precision(2); // to round to 2 places
std::cout << 0.878;
// output: 0.88

(printf is fine too btw)

To get the rounded value is not as direct as calling a function. There is a std::round() function in <cmath>, but that rounds to the nearest integer.
https://cplusplus.com/reference/cmath/round/

To round a number to a specific decimal place, see the method described here
https://stackoverflow.com/a/57459521

Answer 2

You could use a round() method or string formatting:
printf("%.2f", 1.234);

Answer 3

Thanks Lisa