/in/foo.cc: In function 'int main()':
/in/foo.cc:10:13: warning: right operand of comma operator has no effect [-Wunused-value]
  ku=wa,wuwa,a;
             ^
/in/foo.cc:10:14: warning: right operand of comma operator has no effect [-Wunused-value]
  ku=wa,wuwa,a;
              ^