CODEWITHSUNDEEP
c++string
Austin Moore
Austin Moore

Reputation: 1412

How big can the string class in C++ get?

I think the error has to do with my string being too large. If the function worked correctly, I doubt that I would be anywhere near the max string size (unless that really is the problem? I doubt it because this is for a HW assignment and we need to return output with the song lyrics). What is throwing this error? How big can the string get?

Error:

terminate called after throwing an instance of 'std::length_error'  
what():  basic_string::_S_create 
Aborted (core dumped)

Function:

string generateSong(string list[], int num)
{
   string output;

   for(int count = 0; count <= num; count++)
      output += list[count] + " bone connected to the "
      + list[count + 1] + " bone\n";

   return output;
}

Contents of list[]:

string list[9] =
   {
      "toe",
      "foot",
      "leg",
      "knee",
      "hip",
      "back",
      "neck",
      "jaw",
      "head"
   };

num is 9. Is output really becoming too big? Everything compiles fine (using g++).

Upvotes: 0

Views: 1061

Answers (3)

felipemaia
felipemaia

Reputation: 3571

As you're accessing list[count + 1], you can only iterate from 0 to num - 1.

Upvotes: 3

Sarfaraz Nawaz
Sarfaraz Nawaz

Reputation: 361272

The actual problem with your code is here:

for(int count = 0; count <= num; count++)
                     //  ^^^ problem!

It should be count < (num-1), because you're using list[count + 1] in the loop-body.

Upvotes: 4

Joshua Clark
Joshua Clark

Reputation: 1356

The maximum size of std::string is defined my its max_size() function.

Try this:

std::string s;
std::cout << s.max_size();

Upvotes: 1

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