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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. struct HideSite {
  5.     int x, y;
  6.     double distanceToHead;
  7.     double distanceToTorso;
  8. };
  9.  
  10. int main() {
  11.     int err, n, Tx, Ty;
  12.     scanf("%d", &err);
  13.     scanf("%d", &n);
  14.     scanf("%d %d", &Tx, &Ty);
  15.  
  16.     struct HideSite hideSites[n];
  17.  
  18.     for (int i = 0; i < n; ++i) {
  19.         scanf("%d %d", &hideSites[i].x, &hideSites[i].y);
  20.         hideSites[i].distanceToHead = sqrt(pow(hideSites[i].x * 100 - Tx, 2) + pow(hideSites[i].y * 100 - Ty, 2) - 225) / 100.0; // 將距離轉換為m
  21.         hideSites[i].distanceToTorso = sqrt(pow(hideSites[i].x * 100 - Tx, 2) + pow(hideSites[i].y * 100 - Ty, 2) - 1225) / 100.0; // 將距離轉換為m
  22.     }
  23.  
  24.     int headIndex = -1; // 初始化為-1
  25.     int torsoIndex = -1; // 初始化為-1
  26.  
  27.     for (int i = 0; i < n; ++i) {
  28.         if (hideSites[i].distanceToHead <= err) {
  29.             headIndex = i;
  30.             break;
  31.         } else if (hideSites[i].distanceToTorso <= err) {
  32.             if (torsoIndex == -1) {
  33.                 torsoIndex = i;
  34.             } else {
  35.                 // 如果已經找到一個軀幹射擊位置，則找到下一個軀幹射擊位置時，比較距離，選擇較近的位置
  36.                 if (hideSites[i].distanceToTorso < hideSites[torsoIndex].distanceToTorso) {
  37.                     torsoIndex = i;
  38.                 }
  39.             }
  40.         }
  41.     }
  42.  
  43.     if (headIndex != -1) {
  44.         printf("%d\n", headIndex);
  45.     } else if (torsoIndex != -1) {
  46.         printf("%d %d\n", torsoIndex, headIndex); // 注意：這裡輸出的是軀幹射擊位置的索引和頭部射擊位置的索引
  47.     } else {
  48.         printf("abort\n");
  49.     }
  50.  
  51.     return 0;
  52. }
  53.  
Success #stdin #stdout 0.01s 5508KB
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https://ideone.com/IZijAk
language:
C (gcc 8.3)
created:
2 years ago
visibility:
public

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