/in/foo.cc: In function 'void output()':
/in/foo.cc:20:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
 for(;k<9;k++)printf("0"); printf("%d",F[n][i]);//不足9位的输出0
 ^~~
/in/foo.cc:20:27: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
 for(;k<9;k++)printf("0"); printf("%d",F[n][i]);//不足9位的输出0
                           ^~~~~~