/in/foo.c: In function 'jisuan':
/in/foo.c:27:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/in/foo.c: In function 'main':
/in/foo.c:43:15: warning: 'temp' may be used uninitialized in this function [-Wmaybe-uninitialized]
         ans[i]=temp;
         ~~~~~~^~~~~