求助

Starriuniversky @ 2022-03-16 23:03:02

#include<bits/stdc++.h>
using namespace std;
int main(){
    long long n;
    cin>>n;
    if(n<0)
    {
        cout<<"-";
        n*=-1;
        bool o=1;
        while(o)
        {
            if(n%10==0)
            {
                n/=10;
            }
            else
            {
                o=0;
            }
        }
        while(n>0)
        {
            cout<<n%10;
            n/=10;
        }
    }
    else
    {
        bool o=1;
        while(o)
        {
            if(n%10==0)
            {
                n/=10;
            }
            else
            {
                o=0;
            }
        }
        while(n>0)
        {
            cout<<n%10;
            n/=10;
        }
    }
    return 0;
}

by Jasper08 @ 2022-03-17 23:45:01

@Starriuniversky

#include<iostream>

using namespace std;

int main()
{
  int n;  
  scanf("%d", &n);
  if (n < 0) //取绝对值
  {
    cout << "-";
    n = -n;
  }  

  int sum = 0;   
  while(n != 0) //计算新数
  {
    int k = n % 10;
    sum = sum * 10 + k;   
    n /= 10;   
  }
  printf("%d", sum);
  return 0;
}

by Starriuniversky @ 2022-03-18 21:14:05

@Jasper08 谢谢 dalao

by 违规用户名ddc277a @ 2022-03-26 18:50:19

@Jasper08

#include<iostream>

using namespace std;

int main()
{
  int n;  
  scanf("%d", &n);
  if (n < 0) //取绝对值
  {
    cout << "-";
    n = -n;
  }  

  int sum = 0;   
  while(n != 0) //计算新数
  {
    int k = n % 10;
    sum = sum * 10 + k;   
    n /= 10;   
  }
  printf("%d", sum);
  return 0;
}

你的scanf()没加头文件:cstdio