— Built-in Function: void * __builtin_return_address (unsigned int level) This function returns the return address of the current function, or of one of its callers. The level argument is number of frames to scan up the call stack. A value of 0 yield…
前两天看程序,发现在某个函数中有下面这段程序: int n; //define a variable n int array[n]; //define an array with length n 在我所学的C语言知识中,这种数组的定义在编译时就应该有问题的,因为定义数组时,数组的长度必须要是一个大于0的整型字面值或定义为 const 的常量.例如下面这样 int array1[10]; //valid int const N = 10; int array2[N]; //valid int n…
