0分落泪

Wildchesse @ 2020-08-05 10:27:26

#include <bits/stdc++.h>
using namespace std;
int main()
{
    string a;
    cin>>a;
    int s=0;
    if(a[0]=='-')
    {
        cout<<'-';
        s=1;
    }
    if(a[a.size()]!='0')
    {
        cout<<a[a.size()];
    }
    for(int i=a.size()+1;i!=s;i--)
    {
        cout<<a[i];
    }
//    cout<<endl;
    return 0;
}

by Steven__Chen @ 2020-08-05 10:34:22

a[a.size()]，这不明摆着的越界吗

by yyandy @ 2020-08-05 10:36:42

所以你在写什么？

by guoxinyugz @ 2020-08-05 10:40:16

这题直接用数计算不香吗，搞什么奇奇怪怪的字符串

#include<cstdio>
int n,x;
bool w=0;
int main()
{
    scanf("%d",&n);
    if(n<0)
    {
        printf("-");
        n=-n;
    }
    else if(n==0)
    {
        printf("0");
        return 0;
    }
    while(n>0)
    {
        x=n%10;
        if(x||w)
        {
            printf("%d",x);
            w=1;
        }
        n=n/10;
    }
    return 0;
}

by yyandy @ 2020-08-05 10:41:49

#include <bits/stdc++.h>
using namespace std;
int main(){
    string a;cin>>a;
    int s=0,k=a.length()-1;
    if(a[0]=='-'){cout<<'-';s=1;}
    while (a[k]=='0')--k;
    for(int i=k;i>=s;i--)cout<<a[i];
    return 0;
}

这样也可以啊..

by a_xiao @ 2020-08-05 16:41:38

#include<iostream>
using namespace std;
int main()
{
    int j=9;
    int n;
    int m[10]={0};
    cin>>n;
    if(n<0)
    cout<<"-";
    if(n==0)
    {
        cout<<0;
        return 0;
    }
    for(int i=1;i<=10;i++)
    {
        m[i-1]=n%10;
        n/=10;
    }
    int i=0;
    if(m[0]==0)
    {
        for(i=0;i<=10;++i)
        {
            if(m[i]!=0)
            {
                break;
            }
        }   
    }
    if(m[9]==0)
    {
        for(j=9;j>=0;--j)
        {
            if(m[j]!=0)
            {
                break;
            }
        }
    }
    for(int i=0;i<10;i++)
    {
        if(m[i]<0)
        {
            m[i]-=2*m[i];
        }
    }
    for(;i<=j;i++)
    {
        cout<<m[i];
    }
    return 0;
}

by lynn10 @ 2020-08-29 22:50:22

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int a,b,c=0,num=0;
    cin>>a;
    if(a<0)
    {
        cout<<"-";
        a=-a; 
    }int tem=a;
    while(tem>0)
    {
        tem/=10;
        num++;
    }
    while(a>0)
    {
        b=a%10;
        c+=b*pow(10,num-1);
        num--;
        a/=10;
    }
    cout<<c;
}

这样也行