get number round off to two decimal places c++

To round off a number to two decimal places in C++, you can use the std::setprecision function from the <iomanip> library. Here are the steps to do it:

1. Include the necessary libraries:

#include <iostream>
#include <iomanip>

1. Declare the number that you want to round off:

double number = 3.14159;

1. Set the precision to two decimal places using the std::setprecision function:

std::cout << std::fixed << std::setprecision(2);

The std::fixed manipulator ensures that the number is displayed with a fixed number of decimal places.

1. Print the rounded number:

std::cout << "Rounded number: " << number << std::endl;

Here's the complete code:

#include <iostream>
#include <iomanip>

int main() {
    double number = 3.14159;
    std::cout << std::fixed << std::setprecision(2);
    std::cout << "Rounded number: " << number << std::endl;
    return 0;
}

When you run this code, the output will be:

Rounded number: 3.14

This code sets the precision for the output stream, ensuring that the number is rounded off to two decimal places when it is printed.