weekkkkk12

1.練習程設會考題目

區間測速

區間測速-超速之王

CPE-YOU CAN SAY 11

#include <stdio.h>

#include <string.h>

char a[1001];

 int main()

 {

   while(1){

   scanf("%s",a);

   if( strcmp(a,"0")==0 )break;

   int odd=0,even=0;

   for(int i=0;a[i]!=0;i++)

   {

    if(i%2==0) even +=a[i]-'0';

    else odd+=a[i]-'0';

   }

   if( (even-odd)%11!=0 ) printf("%s is not a multiple of 11.\n",a);

   else printf ("%s is a multiple of 11.\n",a);

    }

}