C++ Round to Two Decimals: Complete Guide

In C++, one can implement rounding to two decimal places using the following methods:

1. Use the setprecision() function in the library to set decimal precision.
2. The following code snippet includes the necessary libraries for input/output and formatting, sets a variable “num” to the value of 3.14159, and then outputs it with exactly two decimal places.
3. The output result is 3.14.
4. Round the result using the round() function and convert it into a string with two decimal places.
5. The code includes libraries for input/output, mathematical operations, strings, and string stream. It defines a function to round a number to two decimal places and demonstrates its implementation in the main function with the number 3.14159.
6. The output is 3.14.

Please note that both methods above will output the result as a string. If you need to retain a floating-point number with two decimal places, you can convert the result to a double type.