Question

好的，我有一个问题让这个工作，所以有人请帮助我这个我试图要求用户搜索一个站名称，如果找到输出它，如果没有然后退出..

struct Trains 
{
    int Train_Id;                   //train ID
    string Station_Origin;             //Station of Origin
    string Destination_Station;        //Station of Destination
    int Departure_Time ;            //Departure Time
    int Arrival_Time ;              //Arrival Time
};

struct Trains  myArray[10];

struct station
{
    string intermediate_station1;      //intermediate_station1
    int Arrival_time1;             // Arrival time to station1 
    string intermediate_station2;      //intermediate_station2
    int Arrival_time2;             // Arrival time to station2 
    string intermediate_station3;     // intermediate_station1
    int Arrival_time3;             // Arrival time to station3   
};


struct station myArray1[3];

/*****************************************************************************/

int main ()
{
     /*  Setting up Train and Station Information  */ 
    int N_TRAIN;
    int n; 
    int a;

    do 
    {
         cout  << " Enter number of Trains on Track: " <<endl;

         cin >> N_TRAIN;
         cout << endl;        
    }while(N_TRAIN > 10 || N_TRAIN < 0);

    for(n=0; n < N_TRAIN; n++)
    {
        while((cout<<" Enter Train ID: ")&&( (cin>>myArray[n].Train_Id)||myArray[n].Train_Id <0))
        {
            cout<<" Invalid Input! Please Enter Train ID: "<<endl;
            cin.clear();
            cin.ignore(1000,'\n'); 
        }

        cout << " Name of Station of Origin: ";
        cin >> myArray[n].Station_Origin;

        cout << " Name of Destination Station: ";
        cin >> myArray[n].Destination_Station;

        while((cout<<"Enter Departure Time: Please Enter 24hr!")&&(!(cin>>myArray[n].Departure_Time)||myArray[n].Departure_Time < 0))
        {
            cout<<" Invalid Input! Enter Departure Time: Please Enter 24hr !"<<endl;
            cin.clear();
            cin.ignore(1000,'\n'); 
        }

        while((cout<<" Enter Arrival Time: Please Enter 24hr! ")&&(!(cin>>myArray[n].Arrival_Time)||myArray[n].Arrival_Time < 0))
        {
            cout<<" Invalid Input! Enter Arrival Time: Please Enter 24hr! "<<endl;
            cin.clear();
            cin.ignore(1000,'\n');    
        }

        cout << " Name of Station of intermediate station1: ";
        cin >> myArray1[a].intermediate_station1;    

        while((cout<<" Enter Arrival Time For intermediate station1: Please Enter 24hr! ")&&(!(cin>>myArray1[a].Arrival_time1)||myArray1[a].Arrival_time1 < 0))
        {
            cout<<" Invalid Input! Enter Arrival Time: Please Enter 24hr! "<<endl;
            cin.clear();
            cin.ignore(1000,'\n'); 
        }

        cout << " Name of Station of intermediate station2: ";
        cin >> myArray1[a].intermediate_station2;


        while((cout<<" Enter Arrival Time For intermediate station2: Please Enter 24hr! ")&&(!(cin>>myArray1[a].Arrival_time2)||myArray1[a].Arrival_time2 < 0))
        {
            cout<<" Invalid Input! Enter Arrival Time For intermediate station2: Please Enter 24hr!"<<endl;
            cin.clear();
            cin.ignore(1000,'\n'); 
        }

        cout << " Name of Station of intermediate station3: ";
        cin >> myArray1[a].intermediate_station3;    

        while((cout<<" Enter Arrival Time For intermediate station3: Please Enter 24hr!")&&(!(cin>>myArray1[a].Arrival_time3)||myArray1[a].Arrival_time3 < 0))
        {
            cout<<" Invalid Input! Enter Arrival Time For intermediate station3: Please Enter 24hr!"<<endl;
            cin.clear();
            cin.ignore(1000,'\n'); 
        }
   }

    /* SEARCHING BY STATION NAME: */        
    else if (choice == 3)
    {
        int origin;
        int result;

        for (n=0; n < N_TRAIN ;n++)
        {       

            cout << " Enter the Name of Departure Station: " ;
            cin >> origin;

            origin = searchfs();
            if (origin = myArray[n].Station_Origin )
               cout << "Trains Departs " << " " <<myArray[n].Station_Origin << "at" << " " << myArray[n].Departure_Time << " " << " Hours " <<endl;

            else if   (origin = myArray[n].Destination_Station )
                cout << "Trains Departs " << " " <<myArray[n].Destination_Station << "at" << " " << myArray[n].Departure_Time << " " << " Hours " <<endl;

            else if  (origin =  myArray1[a].intermediate_station1 )      
                cout << "Trains Departs " << " " <<  myArray1[a].intermediate_station1<< "at" << " " << myArray1[a].Arrival_time1 << " " << " Hours " <<endl;

            else if  (origin =  myArray1[a].intermediate_station2 )
                cout << "Trains Departs " << " " <<  myArray1[a].intermediate_station2 << "at" << " " << myArray1[a].Arrival_time2 << " " << " Hours " <<endl;

            else if  (origin =  myArray1[a].intermediate_station3 )
                cout << "Trains Departs " << " " <<  myArray1[a].intermediate_station3<< "at" << " " << myArray1[a].Arrival_time3 << " " << " Hours " <<endl;

            else if (result == -1)
                cout << " Train doesnt not Depart at "<< " " << origin << endl;
    }
}

Answer 1

在一些地方看起来你有一个任务（单=）你打算测试相等（双==），如下例所示：

if (origin = myArray[n].Station_Origin)

此外，Station_Origin和intermediate_station1/2/3定义为std::string，而origin定义为int。您正在尝试将string分配或比较为int。

Answer 2

您还没有告诉我们正在发生什么，所以我们只能通过扫描代码来猜测。令我印象深刻的是：

for(n=0; n < N_TRAIN; n++)
{
    ...
}      
else if (choice == 3)
{
}

和choice未定义你如何解决尽可能多的错误信息，然后告诉我们那些困扰你的具体信息。

在Struct中搜索字符串

2 个答案: