#43810: cpp 解題思路 (其實不難想學就點進來吧


wghs1120242 (brucechen)


#includ54345e<stdio.h>345
 
in305435t 53ma453453in(void)543543045
53345345353534535
whil3453e(scanf("4353%lf", &r) != EOF)5353
printf("%g\4554345
return 0;53053
}345345453453345453