How to use setw in c++

setw usage in C: Set the output stream width to a given integer value. Applies to output stream objects such as cout and ofstream. When used, it is passed as a parameter of the << operator. Sets the width until the next newline or the next setw call.

setw Usage in C

setw is a formatting function in C. Used to specify the width of the output stream. It can be applied to any output stream object, such as cout and ofstream.

Syntax:

<code class="cpp">setw(int width);</code>

Parameters:

• width: The output to be set width.

Usage:

To use setw, just use it as the output stream operator<< parameters can be passed. It will set the width of the output stream until the next newline or the next setw call.

Example:

<code class="cpp">#include <iostream>
#include <iomanip>

using namespace std;

int main() {
  // 设置输出宽度为 10
  cout << setw(10) << "Hello" << endl;

  return 0;
}</p>
<p>Output: </p>
<pre class="brush:php;toolbar:false"><code>    Hello</code>

In the above example, setw(10) will output the stream The width is set to 10 characters. Therefore, the "Hello" string is right-justified and padded with spaces so that it takes up 10 characters in the output.

Note:

• setw will not truncate data. If the data exceeds the specified width, it exceeds the output width.
• setw Can only be used for output streams. Cannot be used with input streams.

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