Getting the Length of a String, String length and capacity - C++ STL

C++ examples for STL:string

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Description

Getting the Length of a String, String length and capacity

Demo Code

#include <string>
#include <iostream>

using namespace std;

int main() {/* ww  w . j a  va 2s  .  co  m*/

   string s = "";
   string sr = "";

   sr.reserve(9000);

   cout << "s.length    = " << s.length()   << '\n';
   cout << "s.capacity  = " << s.capacity() << '\n';
   cout << "s.max_size  = " << s.max_size() << '\n';

   cout << "sr.length   = " << sr.length()   << '\n';
   cout << "sr.capacity = " << sr.capacity() << '\n';
   cout << "sr.max_size = " << sr.max_size() << '\n';

   for (int i = 0; i < 10000; ++i) {

      if (s.length() == s.capacity()) {
         cout << "s reached capacity of " << s.length() << ", growing...\n";
      }
      if (sr.length() == sr.capacity()) {
         cout << "sr reached capacity of " << sr.length() << ", growing...\n";
      }
      s += 'x';
      sr += 'x';
   }
}

Result


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