代码

#include <stdio.h>
#include <vector>
volatile int sink;
void f(const std::vector<int>& x) {
    sink = x[888];
}
void g(int* begin, int* end) {
    f(std::vector<int>(begin, end));
}
int arr[1048576];
int main() {
    for (int i=0; i<1048576; i+=1024) arr[i] = i;
    g (arr, arr + 1048576);
}

评测结果