《算法笔记》3.1小节——入门模拟->简单模拟

C简单，但是代码有点冗余，优化后省掉一般代码，保持优化习惯

#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;
int main()
{
    int a,b;
    while(scanf("%d%d",&a,&b)!=EOF)
    {
        int a1=a;
        int b1=b;
        int ans=0;
        while(a1/10 || a1%10)
        {
            int temp=a1%10;
            a1=a1/10;
            b1=b;
            while(b1/10)
            {
                int temp2=b1%10;
                b1=b1/10;
                ans=ans+temp*temp2;
            }
            ans=ans+b1*temp;
        }
        printf("%d\n",ans);
    }
    return 0;
}

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