如果这个数中间有0的话，比如是100204，你的答案就是421
by Naffygo @ 2017-08-04 15:51:56
```cpp
#include<bits/stdc++.h>
using namespace std;
long long fz(long long a)
{
long long s=0;
while(a)
{
s=s*10+a%10;
a/=10;
}
return s;
}
int main()
{
long long a;
cin>>a;
cout<<fz(a);
return 0;
}
函数
```
by xiashuai @ 2017-08-10 20:50:07
```cpp
#include<iostream>
using namespace std;
int main(){
int a,i=0;
cin>>a;
while(a!=0){
i=i*10+a%10;
a/=10;
}
cout<<i;
return 0;
}
```
by Goodenough @ 2017-08-12 17:15:52