为什么只有70啊.感觉没错

#include<iostream>
#include<cstdlib>
#include<cstdio>
#include<cmath>
using namespace std;
int main()
{
    int n=0;
    cin>>n;
    if(n<0)
    {cout<<"-";
    n=-n;}
    if(n==0)
    {cout<<"0"<<endl;
    return 0;}
    for(;n>10;)
    {if(n%10!=0)
     cout<<n%10;
     n=n/10;}
     cout<<n;
     return 0;
}