Question

How to resize string in C++

Answer 1

#include <iostream>
  
int main() {
    std::string s = "c++";
 
    std::cout << s << " : " << s.size() << "\n";
 
    s.resize(s.size() + 3, '+');     
     
    std::cout << s << " : " << s.size() << "\n";
}
  
  
  
/*
run:
  
c++ : 3
c+++++ : 6
  
*/

 

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Answer 2

#include <iostream>
   
int main() {
    std::string s = "c++";
  
    std::cout << s << " : " << s.size() << "\n";
  
    s.resize(s.size() + 5);     
      
    std::cout << s << " : " << s.size() << "\n";
     
    s[3] = ' '; s[4] = '1'; s[5] = '7';
     
    std::cout << s << " : " << s.size() << "\n";
}
   
   
   
/*
run:
   
c++ : 3
c++ : 8
c++ 17 : 8
   
*/

 

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Answer 3

#include <iostream>

using std::cout;
using std::endl;
using std::string;
 
int main()
{
    string s = "c c++ java php";
 
    cout << s.size() << endl;
 
    s.resize(30);
 
    cout << s.size() << endl;
}
 
 
/*
run:
 
14
30
 
*/

 

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