set precision with fixed c++

To set precision with fixed in C++, you can use the std::fixed manipulator along with the std::setprecision function. Here are the steps to do it:

1. First, include the necessary header file for input/output operations: cpp #include <iostream> #include <iomanip>

2. Inside your code, use the std::fixed manipulator to set the floating-point output format to fixed-point notation: cpp std::cout << std::fixed;

3. Use the std::setprecision function to specify the number of digits to be displayed after the decimal point: cpp std::cout << std::setprecision(2);

In this example, 2 is used as the argument to std::setprecision to display the number with two digits after the decimal point. You can replace 2 with any desired value.

1. Finally, output the floating-point number using std::cout: cpp double number = 3.14159; std::cout << number;

The output will be 3.14, with two digits after the decimal point.

By combining the std::fixed manipulator and the std::setprecision function, you can control the precision of the floating-point output in C++.