View Compilation Error

0_0_22763347_8249.cpp:10:6: error: expected ']' before ';' token
 }a[22;
      ^
0_0_22763347_8249.cpp: In function 'int main()':
0_0_22763347_8249.cpp:27:9: error: 'a' was not declared in this scope
    cin>>a[i].x>>a[i].y;
         ^
0_0_22763347_8249.cpp:38:16: error: 'a' was not declared in this scope
       dis[0]=d(a[i],a[j]);
                ^