C++ String shrink_to_fit() function

by Online Tutorials Library July 22, 2022

C++ String shrink_to_fit()

This function reduces the capacity of the string and makes it equal to its size.

Syntax

Consider a string str. Synatx would be:

Parameter

It does not contain any parameter.

Return value

It does not return any value.

Example 1

Let’s see the simple example.

  #include<iostream>  using namespace std;  int main()  {  string str=”C++ Programming”;  cout<<str.capacity()<<‘n’;  str.shrink_to_fit();  cout<<str.capacity();  return 0;  }  

Output:

15  15

In this example, shrink_to_fit() function is applied to the string so that capacity of string becomes equal to the size of string.

Example 2

Let’s see another simple example.

  #include<iostream>  using namespace std;  int main()  {  string str=”Computer is my favorite subject”;  cout<<“Initial string value is :”<<str<<‘n’;  str.resize(24);  cout<<“After resizing,string value is :”<<str<<‘n’;  str.shrink_to_fit();  cout<<“capacity of the string is :”<<str.capacity()<<‘n’;  cout<<“size of the string is  :”<<str.size();              return 0;  }  

Output:

Initial string value is: Computer is my favorite subject  After resizing, string value is: Computer is my favorite   capacity of the string is :24  size of the string is  :24

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