/in/foo.cc: In function 'int main()':
/in/foo.cc:5:32: warning: unused variable 'give' [-Wunused-variable]
     int yong,qian,chung=0,i,gg,give,die;
                                ^~~~
/in/foo.cc:25:16: warning: 'gg' may be used uninitialized in this function [-Wmaybe-uninitialized]
         cout<<-gg;//Êä³ö͸֧ÔÂ·Ý 
                ^~
/in/foo.cc:7:13: warning: 'qian' may be used uninitialized in this function [-Wmaybe-uninitialized]
         qian+=300;//Ò»¿ªÊ¼µÄ¼Ó300 
         ~~~~^~~~~