/in/foo.c: In function 'main':
/in/foo.c:8:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(i=0;i<2;i++) //冒泡排序
  ^~~
/in/foo.c:15:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   for(i=0;i<3;i++) 
   ^~~