c++ - How to memset a 2D arrray? -

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i want memset 2d array 0. here's code.. giving me seg fault;

      bool **visited=new bool*[m];          for(int i=0;i<m;++i)            visited[i] = new bool[m];

i have tried memset(visited, 0, sizeof(visited[0][0]) * m * m); , memset(visited, 0, sizeof visited); , nonw of works , gives me segfault. how do that?

your array not contiguous since not multi-dimensional array. it's array of arrays, known jagged array.

so, rows can, , will, disjoint. hence you'll need call memset on each row.

bool **visited=new bool*[m]; for(int i=0;i<m;++i) {     visited[i] = new bool[m];     memset(visited[i], 0, sizeof(visited[i][0]) * m); }

although, can't refrain pointing out should using c++ features rather writing appears c use of new operator.


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