2. Write a cpp program which explains the use of a manipulators operator.

In C++, manipulators are special functions that can be used to modify the behavior of the stream insertion (<<) and stream extraction (>>) operators. They are often used to format output or parse input from streams, such as cout and cin.

Here's an example of how you can use manipulators to format output in C++:

#include <iostream>
#include <iomanip>

using namespace std;

void main()
{
  cout << fixed << setprecision(2);  // use fixed-point notation with 2 decimal places

  cout << 123.4567 << endl;  // prints 123.46
  cout << 987.6543 << endl;  // prints 987.65

  cout << setw(10) << left;  // set field width and left-justify values

  cout << 123 << endl;  // prints "     123"
  cout << 456 << endl;  // prints "     456"

  return 0;
}

Output

In this example, we use the fixed and setprecision manipulators to specify that we want to use fixed-point notation with 2 decimal places when printing floating-point values. We also use the setw and left manipulators to set the field width and left-justify values when printing integers.

There are many other manipulators available in C++, including hex, oct, uppercase, boolalpha, and showpos.

You can find more information about manipulators in the C++ standard library documentation.

Output​

Output