#include <stdio.h>voidg(intk,intt){if(k==0)return;g(k/10,t+1);putchar('0'+k%10);if(t==4)printf("万");elseif(t==8)printf("億");elseif(t%3==0&&t!=0)putchar(',');}voidf(intk){g(k,0);putchar('\n');}intmain(){f(123);f(1234);f(12345);f(123456);f(1234567);f(12345678);f(123456789);f(1234567890);return0;}/* end */