以下是给出的C++代码,实现了针对磁带调度问题的请求顺序优化:
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
struct Request {
int wrap;
double distance;
};
double getTimeToMove(int w1, double d1, int w2, double d2) {
double time = 0.0;
// Step 1: Change band if necessary
if (w1 / 52 != w2 / 52) {
time += 4.0;
}
// Step 2: Change wrap if necessary
if (w1 != w2) {
time += 1.0;
// Step 3: Move to the closest anchor position
int anchorW2 = (w2 / 26) * 26 + ((w2 % 26) % 2 == 0 ? (d2 >= 480.0 ? 25 : 0) : (d2 >= 480.0 ? -1 : -26));
// Calculate time to move to the anchor position
double distanceToAnchor = fabs(d1 - anchorW2 * 30);
time += distanceToAnchor / 8.0;
// Check if direction change is needed
bool directionChange = false;
if ((d1 > d2 && anchorW2 < w2) || (d1 < d2 && anchorW2 > w2)) {
directionChange = true;
time += 2.5; // Direction change penalty
}
// Step4: Slowly move to the position
double slowDistance = fabs(anchorW2 *30 - d2);
time += slowDistance / (directionChange ? 4.0 : 2.0);
}
return time;
}
bool compareRequests(const Request& r1, const Request& r2) {
double time1 = getTimeToMove(0, 0.0, r1.wrap, r1.distance);
double time2 = getTimeToMove(0, 0.0, r2.wrap, r2.distance);
return time1 < time2;
}
int main() {
int n;
cin >> n;
vector<Request> requests(n);
for (int i = 0; i < n; i++) {
cin >> requests[i].wrap >> requests[i].distance;
}
// Sort the requests based on the optimized order
sort(requests.begin(), requests.end(), compareRequests);
// Print the order of execution
for (int i = 0; i < n; i++) {
cout << i << " ";
}
cout << endl;
return 0;
}
希望以上代码能够满足你的需求,如有其他问题,请随时提问。
内容由零声教学AI助手提供,问题来源于学员提问