```cpp
if(a[i]!='0') printf("%c", a[i]);
``````
它因该只是要你去前导零，你这是把0全去了吧？
by willJ @ 2023-09-01 20:08:42
-103
试试
by Rieman_sum @ 2023-09-01 20:09:02
@[TheWindbell](/user/1057556)
by willJ @ 2023-09-01 20:13:57
@[willJ](/user/826138)
**谢谢！**
最终代码：
```cpp
#include <bits/stdc++.h>
#define maxn 20
char a[maxn];
int main()
{
scanf("%s", &a);
if(!strcmp(a, "0")) {
printf("0"); return 0;
}
if(a[0]=='-') printf("-");
int mul = 1;
for(int i=strlen(a)-1; i>=(a[0]=='-'); i--) {
mul *= (a[i]=='0');
if(mul==0) printf("%c", a[i]);
}
return 0;
}
```
by TheWindbell @ 2023-09-01 21:48:05
@[Guo1](/user/743879) **多谢提醒！**
by TheWindbell @ 2023-09-01 21:48:44