别管对不对，你就说有没有插入到首部吧
int main(void) { int nums[] = { 1, 2, 3 }; int* p = &nums[0]; p--; *p = 0; for (size_t i = 0; i < 4; i++) { std::cout << p[i] << std::endl; } return 0; }
int main(void) {
int nums[] = { 1, 2, 3 };
int* p = &nums[0];
p--;
*p = 0;
for (size_t i = 0; i < 4; i++)
{
std::cout << p[i] << std::endl;
}
return 0;
}