笔试思科后，我才知道我没有学C++ (zz)

const int x = 5;

int main()

{

int x = x;

printf("%d\n",x);

return 0;

}

GCC编译后输出是

1994628660

随机结果

const int x = 5;

int main()

{

int x[x];

printf("%d\n",sizeof(x)/sizeof(int));

return 0;

}

该题输出为 5.

The point of declaration for a name is immediately after its complete declarator (Clause 8) and before its

initializer (if any), except as noted below. [ Example:

int x = 12;

{ int x = x; }

Here the second x is initialized with its own (indeterminate) value. —end example ]

[ Note: a name from an outer scope remains visible up to the point of declaration of the name that hides

it.[ Example:

const int i = 2;

{ int i[i]; }

declares a block-scope array of two integers. —end example ] —end note ]