动态申请二维数组（二）

//C语言中动态的申请二维数组 malloc free#include <stdio.h>#include <stdlib.h>#include <string.h>//动态申请二维数组int **malloc_Array2D(int row, int col){    int size = sizeof(int);    int point_size = sizeof(int*);    //先申请内存，其中point_size * row表示存放row个行指针    int **arr = (int **) malloc(point_size * row + size * row * col);    if (arr != NULL)    {        memset(arr, 0, point_size * row + size * row * col);        T *head = (T*)((int)arr + point_size * row);        while (row--)            arr[row] = (int*)((int)head + row * col * size);    }    return arr;}//释放二维数组void free_Aarray2D(void **arr){    if (arr != NULL)        free(arr);}int main(){    printf("  C语言中动态的申请二维数组 malloc free\n");    printf(" -- by MoreWindows( http://blog.csdn.net/MoreWindows ) --\n\n");    printf("请输入行列(以空格分开): ");    int nRow, nCol;    scanf("%d %d", &nRow, &nCol);    //动态申请连续的二维数组    int **p = malloc_Array2D(nRow, nCol);    //为二维数组赋值    int i, j;    for (i = 0; i < nRow; i++)        for (j = 0; j < nCol; j++)            p[i][j] = i + j;    //输出二维数组    for (i = 0; i < nRow; i++)    {        for (j = 0; j < nCol; j++)            printf("%4d ", p[i][j]);        putchar('\n');    }    free_Aarray2D((void**)p);    return 0;}