C + + and C dynamic request two-dimensional arrays

This is a question I encountered in the interview, using C and C + + to apply for a two-dimensional array, int **res, the request can be used after the res[3][4] This type of anti-storage mode.

This is a version with no error checking.

Answer:

Version of the C + + language

int **allocate (int row, int column) {    int **res = new int*[row];    for (int i = 0; i < row; i++) {        res[i] = new int[column];    }    return Res;}    

C language

int **allocate (int  int  column) {    int **res = (int * *) malloc (sizeof(int *) * row);      for (int0; i < row; i++) {        = (int *) malloc (sizeof(int ) * column);    }     return Res;}

C + + and C dynamic request two-dimensional arrays