Question

Assume the following variable definition appears in a program:

double number = 12.3456;
Write a cout statement that uses the setprecision manipulator and the fixed manipulator to display the number variable rounded to 2 digits after the decimal point. (Assume that the program includes the necessary header file for the manipulators.)

Answer 1

cout << setprecision(2)<< fixed << number;

Step-by-step explanation:

The above statement returns 12.35 as output

Though, the statement can be split to multiple statements; but the question requires the use of a cout statement.

The statement starts by setting precision to 2 using setprecision(2)

This is immediately followed by the fixed manipulator;

The essence of the fixed manipulator is to ensure that the number returns 2 digits after the decimal point;

Using only setprecision(2) in the cout statement will on return the 2 digits (12) before the decimal point.

The fixed manipulator is then followed by the variable to be printed.

See code snippet below

#include <iostream>

#include <iomanip>

using namespace std;

int main()

{

// Initializing the double value

double number = 12.3456;

//Print result

cout << setprecision(2)<< fixed << number;

return 0;

}