四、改错题

 1 #include <stdio.h>
 2 #include <stdlib.h>
 3 
 4 
 5 void fun(long s,long *t){
 6     int d;
 7     long s1=1;
 8     *t=0;
 9     while(s>0){
10         d=s%10;
11         if(d%2==0){
12             *t=d*s1+*t;
13             s1*=10;
14         }
15         s/=10;
16     }
17 }
18 
19 int main()
20 {
21     long s,t;
22     scanf("%ld",&s);
23     fun(s,&t);
24     printf("The result is:%ld\n",t);
25     return 0;
26 }

运行结果：