malloc 实现二维数组

#include <malloc.h>  #include <stdio.h>  int main()  {      int **a = malloc(sizeof(int)*3);      a[0]= malloc(sizeof(int)*2);      a[1]= malloc(sizeof(int)*2);      a[2]= malloc(sizeof(int)*2);      a[0][0] =1;      a[0][1] =2;      a[1][0] =3;      a[1][1] = 4;      a[2][0] =5;      a[2][1] = 6;      printf("%d\t%d\t%d\t%d\t%d\t%d\n",a[0][0],a[0][1],a[1][0],a[1][1],a[2][0],a[2][1]);       free(a[0]);      free(a[1]);      free(a[2]);      free(a);  }  [cpp] view plaincopy#include <malloc.h>  #include <stdio.h>  int main()  {      int (*a)[2] = malloc(sizeof(int)*3*2);      a[0][0] =1;      a[0][1] =2;      a[1][0] =3;      a[1][1] = 4;      a[2][0] =5;      a[2][1] = 6;      printf("%d\t%d\t%d\t%d\t%d\t%d\n",a[0][0],a[0][1],a[1][0],a[1][1],a[2][0],a[2][1]);       free(a);  }