/in/foo.cc: In function 'int main()':
/in/foo.cc:6:18: warning: unused variable 't' [-Wunused-variable]
  int i=0,y=0,s=0,t;
                  ^
/in/foo.cc:8:19: warning: 'r[-1]' is used uninitialized in this function [-Wuninitialized]
  for (i = 0; r[i-1] != 'E'; i++)
              ~~~~~^