下载数据自测是对的，但测评机就想让我爆0

regime @ 2020-09-06 14:16:29

#include<bits/stdc++.h>
using namespace std;
int n;
char s[200001],last[200001],ch;
int main(){
//  freopen("P1957 口算练习题.in","r",stdin);
//  freopen("P1957 口算练习题.out","w",stdout);
    ch=getchar(),getchar();
    n=ch-'0';
    for(int l=1;l<=n;l++){
        gets(s);
        int x=0,y=0,len=strlen(s);
        if(s[0]>='0'&&s[0]<='9'){
            int i;
            for(i=0;s[i]>='0'&&s[i]<='9';i++)x=x*10+(s[i]-'0');
            i++;
            while(i<len){
                y=y*10+(s[i]-'0');
                i++;
            }
//          printf("%d %d\n",x,y);
        }
        else{
            int i;
            for(i=2;s[i]>='0'&&s[i]<='9';i++)x=x*10+(s[i]-'0');
            i++;
            while(i<len){
                y=y*10+(s[i]-'0');
                i++;
            }
//          printf("%d %d\n",x,y); 
        }   
//      printf("%d %d\n",x,y);
        int k;
        if(s[0]=='a')printf("%d+%d=%d\n",x,y,x+y),k=x+y;
        if(s[0]=='b')printf("%d-%d=%d\n",x,y,x-y),k=x-y;
        if(s[0]=='c')printf("%d*%d=%d\n",x,y,x*y),k=x*y;
        if(s[0]>='0'&&s[0]<='9'){
            if(last[0]=='a')printf("%d+%d=%d\n",x,y,x+y),k=x+y;
            if(last[0]=='b')printf("%d-%d=%d\n",x,y,x-y),k=x-y;
            if(last[0]=='c')printf("%d*%d=%d\n",x,y,x*y),k=x*y;
        }
        int ans;
        if(s[0]>='a')ans=len-1;
        else ans=len+1; 
        if(k<0)ans++,k*=-1;
        while(k>0)k/=10,ans++;
        if(l==n)printf("%d",ans);
        else printf("%d\n",ans);
        for(int i=0;i<len;i++)last[i]=s[i];
    }   
    return 0;
} 

by Spasmodic @ 2020-09-06 14:17:37

@regime 没删freopen？

by regime @ 2020-09-06 14:19:08

当然删了

by Smile_Cindy @ 2020-09-06 14:19:49

here

by regime @ 2020-09-06 14:23:41

为毛luoguIDE与我dev的结果不一样？

by entity @ 2020-10-28 22:11:41

@Alpha 洛谷IDE和我的DEV结果一样，但还是WA

by WeiqiWen2009 @ 2020-12-05 13:55:30

#include<bits/stdc++.h>
using namespace std;
int a,b,ans,n;
char c,a1[100];
int f(int ans)
{
    int len=0;
    if(ans<0)
    {
        len++;
    }
    if(ans==0)
    {
        len++;
    }
    while(ans!=0)
    {
        ans/=10;
        len++;
    }
    return len;
}
int main()
{
    //freopen("P1957_1.in","r",stdin);
    //freopen("P1957.out","w",stdout);
    cin>>n;
    getchar();
    for(int j=0;j<n;j++)
    {
        a=0;
        b=0;
        ans=0;
        int len=2;
        memset(a1,'\0',sizeof(a1));
        gets(a1);
        bool t1=false,t2=false;
        for(int i=0;i<strlen(a1);i++)
        {
            if(a1[i]>='a'&&a1[i]<='z')
            {
                c=a1[i];
            }
            else if(a1[i]>='0'&&a1[i]<='9')
            {
                if(t2==false)
                {
                    a=a*10+(int)(a1[i]-'0');
                    len++;
                    if(a1[i+1]==' ')
                    {
                        t2=true;
                    }
                }
                else if(t2==true)
                {
                    b=b*10+(int)(a1[i]-'0');
                    len++;
                }
            }
        }
        switch(c)
        {
            case 'a':ans=a+b;
                    printf("%d+%d=%d\n",a,b,ans);
                    break;
            case 'b':ans=a-b;
                    printf("%d-%d=%d\n",a,b,ans);
                    break;
            case 'c':ans=a*b;
                    printf("%d*%d=%d\n",a,b,ans);
                    break;
        }
        len+=f(ans);
        printf("%d\n",len);
    }
    return 0;
}
我也是