/in/foo.c: In function 'main':
/in/foo.c:10:9: error: expected ';', identifier or '(' before 'struct'
   10 |         struct ke kes[7]={}
      |         ^~~~~~
/in/foo.c:11:9: error: expected ',' or ';' before 'int'
   11 |         int out;
      |         ^~~
/in/foo.c:15:39: error: 'out' undeclared (first use in this function)
   15 |                 if (kes[i].buyue >kes[out].buyue){
      |                                       ^~~
/in/foo.c:15:39: note: each undeclared identifier is reported only once for each function it appears in