Csu-1850-Grade School Multiplication [模拟]

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题目传送门

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模拟乘法。 注意用longlong存数据。

#include 
#include 
#include 
#include 
#include 
#include 

using namespace std;

void PrintLine(int len)
{
    while (len--)
        printf("-");
    printf("\n");
}
int main(void)
{
    long long x,y;
    int num = 1;
    while (scanf("%lld %lld", &x, &y))
    {
        if (x==0&&y==0)
            break;
        printf("Problem %d\n",num++);
        long long s, ss, yy;
        int f=0;
        s = x*y;
        ss=s;
        yy=y;
        int len = 0;
        while (ss)
        {
            len++;
            ss/=10;
        }
        int lenx = (int)log10(x)+1;
        int leny = (int)log10(y)+1;
        for (int i = 0; i < len-lenx; i++)
            printf(" ");
        printf("%lld\n",x);
        for (int i = 0; i < len-leny; i++)
            printf(" ");
        printf("%lld\n",y);
        PrintLine(len);
        int p = 0, t=0;
        s = 1;
        while (yy)
        {
            while (yy%10==0)
            {
                yy/=10;
                p++;
                t++;
            }
            s = s * (yy%10) * x;
            yy/=10;
            int lens = (int)log10(s)+1;
            for (int i = 0; i < len-lens-p; i++)
                printf(" ");
            printf("%lld",s);
            for (int i = 0; i < t; i++)
                printf("0");
            printf("\n");
            s = 1;
            f++;
            t=0;
            p++;
        }
        if (f>1)
        {
            PrintLine(len);
            s = x*y;
            printf("%lld\n",s);
        }
    }
    return 0;
}