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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int findAppIndex(int* appList, int appListSize, int targetAppName) {
  5.     int left = 0;
  6.     int right = appListSize - 1;
  7.  
  8.     while (left <= right) {
  9.         int mid = left + (right - left) / 2;
  10.  
  11.         if (appList[mid] == targetAppName) {
  12.             return mid;
  13.         } else if (appList[mid] < targetAppName) {
  14.             left = mid + 1;
  15.         } else {
  16.             right = mid - 1;
  17.         }
  18.     }
  19.  
  20.     return -1;
  21. }
  22.  
  23. int main() {
  24.     int appList[] = {0, 4, 6, 9, 13};
  25.     int appListSize = sizeof(appList) / sizeof(appList[0]);
  26.     int targetAppName = 6;
  27.  
  28.     int index = findAppIndex(appList, appListSize, targetAppName);
  29.  
  30.     if (index != -1) {
  31.         cout << "目标应用编号 " << targetAppName << " 的下标为: " << index << endl;
  32.     } else {
  33.         cout << "目标应用编号 " << targetAppName << " 不存在" << endl;
  34.     }
  35.  
  36.     return 0;
  37. }
Success #stdin #stdout 0.01s 5308KB
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Standard input is empty
stdout
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目标应用编号 6 的下标为: 2
https://ideone.com/WzJDhi
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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