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);  
}