Csu-1850-Grade School Multiplication [模拟]

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题目传送门

模拟乘法。注意用longlong存数据。

#include <algorithm>#include <iostream>#include <cstdlib>#include <cstring>#include <cstdio>#include <cmath>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;}

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