View Compilation Error

0_0_15881509_26380.cpp: In function 'int main()':
0_0_15881509_26380.cpp:14:20: error: invalid types 'double [100][double]' for array subscript
    scanf("%lf",&a[i]);
                    ^
0_0_15881509_26380.cpp:15:10: error: invalid types 'double [100][double]' for array subscript
    s+=a[i];
          ^
0_0_15881509_26380.cpp:16:11: error: invalid types 'double [100][double]' for array subscript
     if(a[i]>x)
           ^
0_0_15881509_26380.cpp:17:11: error: invalid types 'double [100][double]' for array subscript
      x=a[i];
           ^
0_0_15881509_26380.cpp:18:13: error: invalid types 'double [100][double]' for array subscript
     if(y>a[i])
             ^
0_0_15881509_26380.cpp:19:11: error: invalid types 'double [100][double]' for array subscript
      y=a[i];//一个循环就够了。
           ^