/in/foo.c: In function 'main':
/in/foo.c:15:43: warning: 'out' is used uninitialized [-Wuninitialized]
   15 |                 if (kes[i].buyue >kes[out].buyue){
      |                                   ~~~~~~~~^~~~~~
/in/foo.c:11:13: note: 'out' was declared here
   11 |         int out;
      |             ^~~