编程练习 找第二大的数

Code Snippet

1. #include <iostream>
2. #include <fstream>
3.  
4. using namespace std;
5.  
6. int main()
7. ...{
8.     ifstream inFile("d:\intArray.txt");
9.     if(!inFile)
10.         ...{
11.             cout<< "File Error"<<endl;
12.             return -1;
13.     }
14.  
15.     int len;
16.     inFile >> len;
17.     int* arrayInt = new int[len];
18.     for(int i = 0; i < len; i++)
19.         inFile >> arrayInt[i];
20.     int indexI = 0, indexII;
21.  
22.     if(arrayInt[0] < arrayInt[1])
23.         indexI = 0, indexII = 1;
24.     else
25.         indexI = 1, indexII = 0;
26.  
27.     for(int i = 1; i < len; i++)
28.         ...{
29.             if(arrayInt[i] > arrayInt[indexI])
30.                 ...{
31.                     indexII = indexI;
32.                     indexI = i;
33.             }
34.             else if(arrayInt[i] > arrayInt[indexII])
35.                 ...{
36.                     indexII = i;
37.             }
38.     }
39.  
40.     cout<<"The second biggest number is " << arrayInt[indexII]<<endl;
41.  
42.     delete[] arrayInt;
43.     return 0;
44. }