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题目1083:特殊乘法(求模运算符的使用)

题目链接:http://ac.jobdu.com/problem.php?pid=1083

 

详解链接:https://github.com/zpfbuaa/JobduInCPlusPlus

 

觉得这道题没有给完整,题目或许应该把数据均为正数说出来。代码就凑合着看吧。

 

参考代码:

//
//  1083 特殊乘法.cpp
//  Jobdu
//
//  Created by PengFei_Zheng on 09/04/2017.
//  Copyright © 2017 PengFei_Zheng. All rights reserved.
//
 
#include <stdio.h>
#include <iostream>
#include <algorithm>
#include <string.h>
#include <cmath>
 
using namespace std;
 
int n, m;
int a[12],b[12];
 
int main(){
    while(scanf("%d%d",&n,&m)!=EOF){
        memset(a,0,sizeof(a));
        memset(b,0,sizeof(b));
        int tmp1 = n, tmp2 = m;
        int len1 = 0, len2 = 0;
        while(tmp1 != 0){
            a[len1++]=tmp1%10;
            tmp1 = tmp1/10;
        }
        while(tmp2 != 0){
            b[len2++]=tmp2%10;
            tmp2 = tmp2/10;
        }
        int ans = 0;
        for(int i = 0 ; i < len1 ; i++){
            for(int j = 0 ; j < len2; j++){
                ans += a[i]*b[j];
            }
        }
        printf("%d\n",ans);
    }
}
/**************************************************************
    Problem: 1083
    User: zpfbuaa
    Language: C++
    Result: Accepted
    Time:0 ms
    Memory:1520 kb
****************************************************************/

 

参考代码2(感觉不对,可以试一下负数的情况,但是OJ数据好像都是正数):

//
//  1083 test负号.cpp
//  Jobdu
//
//  Created by PengFei_Zheng on 09/04/2017.
//  Copyright © 2017 PengFei_Zheng. All rights reserved.
//
 
#include <stdio.h>
#include <iostream>
#include <algorithm>
#include <string.h>
#include <cmath>
 
//这道题目没有判断正负数!!!
//下面这个做法是不对的!!!
using namespace std;
 
int main(){
    char a[11],b[11];
    while(scanf("%s%s",a,b)!=EOF){
        int ans = 0;
        for(int i = 0 ; a[i]!=0 ; i++){
            for(int j = 0 ; b[j]!=0 ; j++){
                ans+=(a[i]-'0')*(b[j]-'0');
            }
        }
        printf("%d\n",ans);
    }
    return 0;
}
/**************************************************************
    Problem: 1083
    User: zpfbuaa
    Language: C++
    Result: Accepted
    Time:0 ms
    Memory:1520 kb
****************************************************************/

 

posted @ 2017-04-09 21:22  伊甸一点  阅读(258)  评论(0编辑  收藏  举报