setw in c++
The setw
function in C++ is part of the <iomanip>
library and is used to set the width of the output field. It is often used in conjunction with the <<
operator to format the output of data.
Here are the steps to use setw
in C++:
- Include the
<iomanip>
header file at the beginning of your program. This header file contains the definition of thesetw
function.
cpp
#include <iomanip>
- Use the
setw
function to set the width of the output field. Thesetw
function takes an integer argument that specifies the width in characters. It returns an object of typestd::setw
that can be used with the<<
operator to set the width of the output field.
cpp
std::cout << std::setw(10);
In this example, the width of the output field is set to 10 characters.
- Use the
<<
operator to output data with the specified width. The<<
operator is used to insert data into the output stream. By using thestd::setw
object returned by thesetw
function, you can set the width of the output field for the following data.
cpp
std::cout << std::setw(10) << "Hello";
In this example, the string "Hello" will be output with a width of 10 characters.
- Repeat steps 2 and 3 as needed to format multiple output fields.
cpp
std::cout << std::setw(10) << "Hello";
std::cout << std::setw(5) << 123;
In this example, the string "Hello" will be output with a width of 10 characters, followed by the number 123 with a width of 5 characters.
That's it! By using the setw
function and the <<
operator, you can set the width of the output field and format your output in C++.