#include <stdio.h>
#include <stdlib.h>

int main()
{
    int current_element = 0;
    int total_element = 8;
    int * dynamic = (int *)malloc(total_element);
    int i;

    for(i=0;i<16;i++)
    {
        if(current_element == total_element)
        {
            total_element *= 2;
            dynamic = (int *)realloc(dynamic,total_element);//在此行貌似出现问题啊，求大虾指教
            if(dynamic == NULL)
            {
                 printf("Could not expand!");
                 exit(1);
            }
        }
        dynamic[current_element++] = i;
        printf("%d ",dynamic[i]);
    }
    free(dynamic);
    return 0;
}

就是想简单测试一下动态数组行不行，可是不能重新分配内存！

大侠提醒的对，malloc和realloc分配的应该是以字节为单位分配的！代码改成如下就对了！

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int current_element = 0;
    int total_element = 8;
    int * dynamic = (int *)malloc(total_element*sizeof(int));//此处修改分配的内存数，要乘以sizeof(int)!
    int i;

    for(i=0;i<16;i++)
    {
        if(current_element == total_element)
        {
            total_element *= 2;
            dynamic = (int *)realloc(dynamic,total_element*sizeof(int));//还有此处修改分配的内存数
            if(dynamic == NULL)
            {
                 printf("Could not expand!");
                 exit(1);
            }
        }
        dynamic[current_element++] = i;
        printf("%d ",dynamic[i]);
    }
    free(dynamic);
    return 0;
}