how to round a float point value in c++ ?? like c programme i can use %.2f for two value after decimal point.

Answer 1

Aliul Nadab ,

you ca do this in c++ by using printf(...):

....
double d = 3.149;
printf("Double value: %.2f", d);
....

Answer 2

Include <iomanip> header file and use std::setprecision(digits) in std::cout. You may also want to add std::fixed if the float becomes scientific notation

Example:
std::cout << setprecision(4) << 10.3428;

//output: 10.34

Answer 3

Lothar why should i use printf function...in c++..we are learning c++ and here is some different we have to keep the syntax remaining for c++ either their will be no different between c and c++.

Answer 4

CarrieForle i just want <iostream> header file using this how can i do?

Answer 5

Aliul Nadab Then you gotta make one yourself. I don't think there's a good reason to stick with iostream though.