fork(1) download
copy 
  1. template<class T>
  2. class Buffer
  3. {
  4.  
  5.     unsigned int siz;
  6.     T *data;
  7.  
  8.  
  9. public:
  10.  
  11.     ///constructor(size,filename,openmode)
  12.     Buffer(unsigned int s,const char* n, const char* m):siz(s)
  13.     {
  14.         data= new T[siz];
  15.     }
  16.  
  17.     ///destructor
  18.     ~Buffer()
  19.     {
  20.         delete[] data;
  21.     }
  22.  
  23.     ///operator[]
  24.     T& operator[](unsigned int i)
  25.     {
  26.         if(i>siz-1)
  27.         {
  28.             unsigned int newsize=siz*2;
  29.             T* tmp=new T[newsize];
  30.             for(unsigned int j = 0; j < siz; j++)
  31.             {
  32.                 tmp[j] = data[j];
  33.             }
  34.             siz=newsize;
  35.             delete[] data;
  36.             data=tmp;
  37.         }
  38.         return data[i];
  39.     }
  40. };     
  41.  
  42. int main() {
  43.     Buffer<char*> s(20,"s.txt","rw");    //20 long char*
  44.     for(unsigned int i=0;i<24;i++){   //it overwrites the size of s after default 20
  45.         s[i]="hey";
  46.     }
  47. }
Success #stdin #stdout 0s 3408KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
https://ideone.com/Dgdcui
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!