C++ array initialization by reference through function -

i'm working on project requires many dynamically sized 2d arrays need accessible across functions. code i'm working on uses pointers double** dynarray this.

r = ...; // rows of matrix, unknown prior runtime  c = ...; // columns of matrix, unknown prior runtime  double** dynarray; 

after checking existing code found arrays being initialized this:

double** dynarray = new double*[r]; for(int r=0; r<r; r++){dynarray[r] = new double[c];} 

in order improve readability write method above. here's came allocate

void initialize2d(double*** data, int r, int c){      (*dynarray) = new double*[r];      for(int r=0; r<r; r++){          (*dynarray)[r] = new double[c];          for(int c=0; c<c; c++){             (*dynarray)[r][c] = 0;         }     } } 

and free memory respectively:

void free2d(double*** data, int r, int c){      for(int r=0; r<r; r++){         delete[] (*data)[r];     }     delete *data; } 

i intended use these methods this:

r = ...; // rows of matrix, unknown prior runtime  c = ...; // columns of matrix, unknown prior runtime  double** dynarray; initialize2d(&dynarray, r, c); /* stuff*/ free2d(&dynarray,r,c); 

after implementing these functions ran valgrind , found qualifies

• definitely lost, sometimes
• possibly lost.

what problem, , proper way initialize through function reference?

write functions following way

double ** initialize2d( int r, int c ) {     double **dynarray = new double *[r];      ( int r = 0; r < r; r++ )     {         dynarray[r] = new double[c]();     }      return dynarray; }  void free2d( double **data, int r ) {     ( int r = 0; r < r; r++ ) delete [] data[r];     delete [] data; } 

and call functions following way

double** dynarray = initialize2d( r, c ); /* stuff*/ free2d( dynarray, r ); dynarray = nullptr; 

take account use standard container std::vector<std::vector<double>> instead of dynamically allocate arrays yourself.