华为机试：元素异同比较

#include <iostream>
#include <algorithm>
using namespace std;

int diff_num(int arr1[],int len1,int arr2[],int len2)
{
int num=0;
int i=len1-1;
int j=len2-1;
int k=(len1<len2)?len1:len2;
k--;
while(k>=0)
{
if(arr1[i]!=arr2[j])
{
num++;
i--;
j--;
k--;
}
else
{
i--;
j--;
k--;
}
}
return num;
}

int main()
{
int arr1[256]={0};
int arr2[256]={0};
int a,k=0,b,l=0;

cin>>a;
while(getchar()!='\n')
{
arr1[k++]=a;
cin>>a;
}
arr1[k++]=a;

cin>>b;
while(getchar()!='\n')
{
arr2[l++]=b;
cin>>b;
}
arr2[l++]=b;

int res=diff_num(arr1,k,arr2,l);
cout<<res;
return 0;
}