扩展如下：（样例）
6->
6,16,26,36->
6,16,26,36,126,136共6个。
再随便编一个吧：
8->
8,18,28,38,48->
8,18,28,38,48,128,138,148,248->
8,18,28,38,48,128,138,148,248,1248->共10个。

#include <stdio.h>
#include <stdlib.h>
//得到数字长度  
int getLength(int num){
    int length = 0;
    while(num/10>0){
        num/=10;
        length++;
    }
    return length+1;
}
//得到最新的数 
int getNum(int num,int hand,int length){
    for(int i=0;i<length;i++){
        hand*=10;
    }
    return hand+num;
}
//得到所有可行的情况 
void getTotle(int num,int &totle,int hand){
    totle++;
    int midNum = hand/2;
    for(int i=1;i<=midNum;i++){
        int length = getLength(num);
        int newNum = getNum(num,i,length);
        getTotle(newNum,totle,i);       
    }
}

int main() {
    int num = 0;
    scanf("%d",&num);
    int totle = 0;
    getTotle(num,totle,num);
    printf("%d",totle);
    return EXIT_SUCCESS;
}