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iomanip setw() function in C++ with Examples

 3 years ago
source link: https://www.geeksforgeeks.org/iomanip-setw-function-in-c-with-examples/
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iomanip setw() function in C++ with Examples
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iomanip setw() function in C++ with Examples
  • Last Updated : 11 Oct, 2019

The setw() method of iomaip library in C++ is used to set the ios library field width based on the width specified as the parameter to this method.

Syntax:

setw(int n)

Parameters: This method accepts n as a parameter which is the integer argument corresponding to which the field width is to be set.

Return Value: This method does not returns anything. It only acts as stream manipulators.

Example 1:

// C++ code to demonstrate
// the working of setw() function
#include <iomanip>
#include <ios>
#include <iostream>
using namespace std;
int main()
{
// Initializing the integer
int num = 50;
cout << "Before setting the width: \n"
<< num << endl;
// Using setw()
cout << "Setting the width"
<< " using setw to 5: \n"
<< setw(5);
cout << num << endl;
return 0;
}
Output: 
Before setting the width: 
50
Setting the width using setw to 5: 
   50

Example 2:

// C++ code to demonstrate
// the working of setw() function
#include <iomanip>
#include <ios>
#include <iostream>
using namespace std;
int main()
{
// Initializing the integer
int num = 50;
cout << "Before setting the width: \n"
<< num << endl;
// Using setw()
cout << "Setting the width"
<< " using setw to 10: \n"
<< setw(10);
cout << num << endl;
return 0;
}
Output: 
Before setting the width: 
50
Setting the width using setw to 10: 
        50

Reference: http://www.cplusplus.com/reference/iomanip/setw/

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