。。。
by Out_Land @ 2017-08-27 15:15:24
我是P党，目测你的代码没问题，也许是细节，自己多出几组数据测测~~
P代码（自己刚手打的，没优化，见谅）：
```cpp
program std;
var
s:ansistring;
s1:string;
i,j,k,t:longint;
begin
readln(s);
t:=1;
for i:=1 to length(s) do
if (s[i]<='9') and (s[i]>='0') then
s1:=s1+s[i]
else begin
val(s1,j);
s1:='';
k:=k+j*t;
if s[i]='+' then t:=1 else t:=-1;
end;
val(s1,j);
k:=k+j*t;
writeln(k);
end.
```
by Out_Land @ 2017-08-27 15:29:29
```cpp
#include<bits/stdc++.h>
using namespace std;
int main(){
long long a=0,flag=1,i,sum=0;
string s;
cin>>s;
s="+"+s;
for(i=0;i<s.size();i++) {
if(s[i]=='+') {
if(flag==1)sum+=a;
if(flag==0)sum-=a;
a=0;flag=1;
continue;
}
if(s[i]=='-'){
if(flag==1)sum+=a;
if(flag==0)sum-=a;
a=0;flag=0;
continue;
}
a=a*10+(s[i]-'0');
}
if(flag==1)sum+=a;
else sum-=a;
cout<<sum;
}
```
xxs
by AK_CSP_is_easy @ 2021-11-26 21:09:45
Python2:print(input())
by AK_CSP_is_easy @ 2021-11-26 21:10:59
c++98:
```cpp
#include<bits/stdc++.h>
using namespace std;
int main()
{
int a,s=0;
while(cin>>a)
s+=a;
cout<<s;
}
```
by AK_CSP_is_easy @ 2021-11-26 21:14:09
```c
#include <bits/stdc++.h>
#define LL long long
const int N=10000+5;
using namespace std;
int n,m;
stack<int> s1;
stack<char> s2;
int lev(char x){
if(x=='+'||x=='-')return 1;
if(x=='*'||x=='/')return 2;
if(x=='^')return 3;
return 0;
}
void calculate(stack<int> &s1,stack<char> &s2){
int y=s1.top();s1.pop();
int x=s1.top();s1.pop();
char z=s2.top();s2.pop();
if(z=='+')s1.push(x+y);
if(z=='-')s1.push(x-y);
if(z=='*')s1.push(x*y);
if(z=='/')s1.push(x/y);
if(z=='^')s1.push(pow(x,y));
}
int c(int x){return x!=0;}
char str[1000000];
int sum[1000000];
int main(){
scanf("%s",str+1);
n=strlen(str+1);
for(int i=1;i<=n;i++){
sum[i]+=sum[i-1];
if(str[i]=='(')sum[i]++;
if(str[i]==')')sum[i]--;
}
bool out=false;
for(int i=2;i<=n;i++)
if( c(lev(str[i])) && c(lev(str[i-1])) ){
out=1;
break;
}
if(( n==1 && c(lev(str[1])) )||sum[n]||out){
cout<<"NO"<<endl;
return 0;
}
stack<int> s1;
stack<char> s2;
int temp=0;
bool flag=false;
for(int i=1;i<=n;i++){
if('0'<=str[i]&&str[i]<='9'){
temp=(temp<<3)+(temp<<1)+str[i]-'0';
flag=true;
}else{
if(flag){
s1.push(temp);
temp=0;
flag=false;
}if(str[i]=='('){
s2.push(str[i]);
continue;
}if(str[i]==')'){
while(s2.top()!='(')calculate(s1,s2);
s2.pop();continue;
}
while(!s2.empty()&&lev(s2.top())>=lev(str[i]))
calculate(s1,s2);
s2.push(str[i]);
}
}
if(flag){
s1.push(temp);
temp=0;
flag=false;
}while(!s2.empty())calculate(s1,s2);
cout<<s1.top()<<endl;
return 0;
}//AC
```
建议不要用
by shit007 @ 2022-05-28 19:24:05