C++ Input and Output Formatting

C++ Code

• The code provided is a C++ program designed to take a floating-point number as input from the user and output it to the console, rounded to two decimal places.
• The #include <iostream> directive is used to include the input/output stream library, which allows for the program to interact with the user through standard input (stdin) and standard output (stdout).
• The #include <iomanip> directive includes the input/output manipulators, such as setprecision, which allows for formatting the output.
• The #include <cmath> directive includes the math library, which provides mathematical functions that can be used in the program.
• The program uses std::cin for input and std::cout for output. The std::cin >> num; line reads the input from the user and stores it in the num variable. The std::cout << std::fixed << std::setprecision(2) << num << std::endl line formats the output to print the value of num with a fixed format and rounds it to two decimal places.
• The std::fixed manipulator sets the output to fixed format, which will ensure that the output is output to two decimal places even if the input number does not have any values after two decimal places.

Missing Code Parts

• A : This is where std::cin should be used to take user input
• --- : This is where << std::fixed << std::setprecision(2) << num << std::endl; should be inserted