
void main() |
{ |
char *p = NULL; |
if((p = new char[10]) !=NULL) |
{ |
strcpy(p, "hello"); |
cout<<p<<endl; |
delete []p;// p 所指的内存被释放,但是p 所指的地址仍然不变 |
p = NULL;//防止变成野指针 |
} |
if(p != NULL) |
{ |
strcpy(p, "world"); |
cout<<p<<endl; |
} |
} |



