/in/foo.c: In function 'main':
/in/foo.c:20:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
         if(shu[i].qimo>80&&shu[i].lun>=1)
         ^~
/in/foo.c:22:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
             if(shu[i].qimo>85&&shu[i].stuclass>80)
             ^~
/in/foo.c:13:13: warning: unused variable 'b' [-Wunused-variable]
     int i,a,b;
             ^