C++ 风格

double** allocateHeap(int rows, int cols){	double **A;	A = new double* [rows];	for (int i=0; i

C 风格

double **p;int i;p = (double **)malloc(20 * sizeof(double *))for(i = 0; i < 20; i++){    p[i] = (double *)malloc(30 * sizeof(double))}        for(i = 0; i < 20; i++){     free(p[i]);}free(p);