全RE,下载的数据也是对的，在DEV上运行没问题。求解答

#include <iostream>
#include<queue>
#include <sstream>
#include <queue>
using namespace std;
int width(int x);
struct ys{
char c;
int number1;
int number2;
};
int main()
{
int n;
cin>>n;
cin.sync();/*这里不放这个输后面入时会有问题，输不进去*/ 
queue<ys> arr;
char c;
int num1;
int num2;
for(int i=0;i<n;++i){
    string s;
    getline(cin,s,'\n');
    stringstream os;
    os<<s;
    if(s[0]=='a'||s[0]=='b'||s[0]=='c'){
        os>>c>>num1>>num2;
    }
    else{
        c=arr.back().c;
        os>>num1>>num2;
    }
    ys temp={c,num1,num2};
    arr.push(temp); 
}
while(!arr.empty()){
    int temp;
    if(arr.front().c=='a'){
        temp=arr.front().number1+arr.front().number2;
        cout<<arr.front().number1<<"+"<<arr.front().number2<<"="<<temp<<endl;
        cout<<width(arr.front().number1)+width(arr.front().number2)+width(temp)+2<<endl;
    }
    else if(arr.front().c=='b'){     
        temp=arr.front().number1-arr.front().number2;
        cout<<arr.front().number1<<"-"<<arr.front().number2<<"="<<temp<<endl;
        cout<<width(arr.front().number1)+width(arr.front().number2)+width(temp)+2<<endl;
    }
    else if(arr.front().c=='c'){
        temp=arr.front().number1*arr.front().number2;
        cout<<arr.front().number1<<"*"<<arr.front().number2<<"="<<temp<<endl;
        cout<<width(arr.front().number1)+width(arr.front().number2)+width(temp)+2<<endl;
    }
    arr.pop();
}
return 0;
}
int width(int x )
{
    int width=0; 
    if(x<0) width++;
    while(x!=0){
        width++;
        x/=10;
    }
return width;
}