/in/foo.cc: In function 'int main()':
/in/foo.cc:22:4: error: jump to label 'A' [-fpermissive]
    A:
    ^
/in/foo.cc:14:11: note:   from here
      goto A;
           ^
/in/foo.cc:17:12: note:   crosses initialization of 'int j'
    for(int j=0;j<n/2;j++)
            ^
/in/foo.cc:16:12: note:   crosses initialization of 'int i'
    for(int i=0;i<n;i++)
            ^
/in/foo.cc:25:1: error: expected '}' at end of input
 } 
 ^