当我使用 printf()
打印字符指针时,它会根据 %u 或 %s 使用转换说明符决定是打印地址还是整个字符串.
When I print a char pointer with printf()
, it makes the decision with conversion specifier whether the address should be printed or the whole string according to %u or %s.
但是当我想用 cout
做同样的事情时,cout
将如何决定应该在地址和整个字符串中打印什么?这是一个示例源:
But when I want to do the same thing with cout
, how will cout
decide what should be printed among address and whole string? Here is an example source:
int main()
{
char ch='a';
char *cptr=&ch;
cout<<cptr<<endl;
return 0;
}
这里,在我的 GNU 编译器中,cout
试图将 ch 作为字符串输出.
Here, in my GNU compiler, cout
is trying to output ch as a string.
如何使用cout
通过cptr
获取ch
的地址?
How I can get address of ch
via cptr
using cout
?
重载解析选择ostream&operator<<(ostream& o, const char *c);
用于打印 C 风格的字符串.你想要另一个 ostream&运算符<<(ostream& o, const void *p);
被选中.您可能最适合在这里使用演员表:
Overload resolution selects the ostream& operator<<(ostream& o, const char *c);
which is used for printing C-style strings. You want the other ostream& operator<<(ostream& o, const void *p);
to be selected. You are probably best off with a cast here:
cout << static_cast<void *>(cptr) << endl;
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