overloading double subscript operator [][] in c++ [duplicate]

Question

how can I overload double subscript operator [][] in c++ ?

I have tried a number of ways.. No specific answer is available anywhere..

thanks in advance..

I have tried this.. But I know its not correct

class Matrix { int row; int col; int ** values; int ptr; public: Matrix(const int r, const int c) { ptr = -1; row = r; col = c; values = new int*[row]; for(int i=0; i<row; i++) { values[i] = new int[col]; } } int & operator[](int p) { if(ptr == -1) ptr = p; return values[ptr][p]; } };

There's no thing like a double subscript operator [][].

πάντα ῥεῖ
– πάντα ῥεῖ

2014-12-31 08:54:21 +00:00
Commented Dec 31, 2014 at 8:54 — πάντα ῥεῖ
– πάντα ῥεῖ, Commented Dec 31, 2014 at 8:54

NPE · Accepted Answer · 2014-12-31 08:56:52Z

double subscript operator [][]

There isn't a double-subscript operator in C++. What you can do is overload operator[] to return an object that also overloads operator[]. This will enable you to write m[i][j].

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