关于sizeof运算符的困惑

Question

我在Mac OSX Lion上使用C++,我创建了以下代码:

float* floatArray = new float[10];

for(int i = 0; i < 10; i++)
{
    floatArray[i] = 0.0 ;
}

std::cout<< "Test size of a float " << sizeof(floatArray[0]) << std::endl;
// The value is 4 byte which is what I would expect.

std::cout<< "Test the size of the whole array" << sizeof(floatArray) <<std::endl;
// the value is 8. I would have expected the value to be 40 bytes.

我不明白的是什么？

提前致谢

Answer 1

表达式sizeof(floatArray)返回指针的大小,而不是指向的大小.