原数为0@[ComradePenguin1917](/user/1086109)
by Xile @ 2023-10-20 16:59:09
```cpp
#include <string>
#include <iostream>
using namespace std;
int main() {
string str;
bool is_zero = true;
cin >> str;
if (str[0]=='0') return puts("0")&&0 ;
if (str[0] == '-') {
cout << '-';
}
for (int i = str.size() - 1; i >= 0; --i) {
if (str[i] != '0' && str[i] != ',') {
is_zero = false;
}
if (!is_zero && str[i] != '-' && str[i] != ',') {
cout << str[i];
}
}
return 0;
}
```
by Xile @ 2023-10-20 17:00:40
@[Xile](/user/428889) 谢谢！
by ComradePenguin1917 @ 2023-10-20 17:04:57
```cpp
if (str[0]=='0') return puts("0")&&0 ;
```
@[Xile](/user/428889) @[Xile](/user/428889) 这里是什么意思呢
by ComradePenguin1917 @ 2023-10-23 08:56:22
@[ComradePenguin1917](/user/1086109) 简写
```cpp
if(str[0]=='0'){
puts("0");
return 0;
}
```
就是如果原数是零直接输出即可
by Xile @ 2023-10-23 18:06:56
@[Xile](/user/428889) 好的，明白了，谢谢
by ComradePenguin1917 @ 2023-10-26 15:11:05