char data[10]; memset(data, 1, sizeof(data)); // right memset(data, 0, sizeof(data)); // right
int data[10]; memset(data, 0, sizeof(data)); // right memset(data, -1, sizeof(data)); // right memset(data, 1, sizeof(data)); // wrong, data[x] would be 0x0101 instead of 1
struct Parameters {
int x;
int* p_x;
};
Parameters par;
par.p_x = new int[10];
memset(&par, 0, sizeof(par));class BaseParameters
{
public:
virtual void reset() {}
};
class MyParameters : public BaseParameters
{
public:
int data[3];
int buf[3];
};
MyParameters my_pars;
memset(&my_pars, 0, sizeof(my_pars));
BaseParameters* pars = &my_pars;
//......
MyParameters* my = dynamic_cast<MyParameters*>(pars);原文：http://blog.csdn.net/my_business/article/details/40537653