/in/foo.cc: In function 'int main()':
/in/foo.cc:41:17: warning: too many arguments for format [-Wformat-extra-args]
 printf("&d",minx);
                 ^
/in/foo.cc:20:8: warning: unused variable 'x' [-Wunused-variable]
  int i,x,y,z;
        ^
/in/foo.cc:20:10: warning: unused variable 'y' [-Wunused-variable]
  int i,x,y,z;
          ^
/in/foo.cc:20:12: warning: unused variable 'z' [-Wunused-variable]
  int i,x,y,z;
            ^