int main(void)
{
    int src[][3]={{1,2,3},{4,5,6},{7,8,9},{1,2,3},{4,5,6},{7,8,9}};  
    int des[6][3]={0,0};//要小心，行数固定
    printf("%d",sizeof(src));
    print(src,6,3);
    memcpy(des,src,sizeof(src));
    print(des,6,3);

    return 1;
}

 

https://www.cnblogs.com/shuqingstudy/p/4733307.html