problem defening a map of structs

This is a discussion on problem defening a map of structs within the C++ Programming forums, part of the General Programming Boards category; Oke, Everyone thanks for the help, I going to the way of using two maps . One struct for making ...

  1. #16
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    Oke,

    Everyone thanks for the help,
    I going to the way of using two maps . One struct for making the ranking and a vector for sorting.

    Roelof

  2. #17
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    Oke,

    I try to put in read a string read from a text-file in pieces.
    Code:
    #include <iostream>
    #include <map>
    #include <string>
    #include <fstream>
    
    using namespace std;
    
    struct teamstats {
        string team_name;
        int played_games, point_made, points_against;
    };
    
    int main() {
        map<string, teamstats> allteams;
        string str,myBuf, home_team, away_team, home_score, away_score;
        int teller=1  ;
    
        ifstream a_file ("test.txt");
        if (!a_file.good()) cerr << "File not found!\n";
            while (a_file >> str) {
                int prevPos=str.size()-1;
                int nextPos=str.size()-1;
                while((str.npos != nextPos)&&(nextPos))
                    {
                        prevPos=nextPos;
                        nextPos=str.rfind(";", prevPos);
                        if(nextPos==str.npos)
                            {
                                nextPos=0;
                                myBuf= str.substr(nextPos, (prevPos+1));
                            }
                        else
                            {
                                nextPos+=1;
                                myBuf= str.substr(nextPos, (prevPos-nextPos+1));
                                if(nextPos==1)
                                nextPos+=1;
                                nextPos-=2;
                            }
                        }
        return 0 ;
        }
    }
    I add a breakpoint in this rule : myBuf= str.substr(nextPos, (prevPos-nextPos+1));
    But when i run the programm the programm doesn't break at the breakpoint

    Roelof

  3. #18
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    Nobody who can tell me what's wrong wit the code.

    Roelof

  4. #19
    C++まいる!Cをこわせ!
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    Does it open the file? Ie, no "file not found" error message?
    If so, you could post the contents of the file for others to test?
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

  5. #20
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    It opens the file.

    The contents of the file is one rule"
    Code:
    msk;mac;80;20
    Roelof

  6. #21
    C++まいる!Cをこわせ!
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    The code works fine for me. It must be your IDE/settings/debugger.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

  7. #22
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    Oke,

    Then I have to look into the manual of code::blocks how a breakpoint works.

    Roelof

  8. #23
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    Oke,

    Another problem.
    I have this code :
    Code:
    #include <iostream>
    #include <map>
    #include <string>
    #include <fstream>
    
    using namespace std;
    
    struct teamstats {
        string team_name;
        int played_games, point_made, points_against, woord;
    };
    
    int main() {
        map<string, teamstats> allteams;
        string str,myBuf , home_team, away_team, home_score, away_score;
        int woord=1  ;
    
        ifstream a_file ("test.txt");
        if (!a_file.good()) cerr << "File not found!\n";
            while (a_file >> str) {
                int prevPos=str.size()-1;
                int nextPos=str.size()-1;
                while((str.npos != nextPos)&&(nextPos))
                    {
                        prevPos=nextPos;
                        nextPos=str.rfind(";", prevPos);
                        if(nextPos==str.npos)
                            {
                                nextPos=0;
                                home_team= str.substr(nextPos, (prevPos+1));
                                cout<<"Thuisspelende team :" << home_team;
                            }
                        else
                            {
                                cout << "woord : " << woord ;
                                nextPos+=1;
                                if (woord==1)
                                {
                                    away_score = str.substr(nextPos, (prevPos-nextPos+1));
                                    cout << "tegengescoord :" << away_score ;
                                };
                                if (woord==2)
                                {
                                    home_score = str.substr(nextPos, (prevPos-nextPos+1));
                                    cout << "zelfgemaakte doelpunten :" << home_score ;
                                };
                                if (woord==3)
                                {
                                    away_team = str.substr(nextPos, (prevPos-nextPos+1));
                                    cout << "Tegenpartij :" << away_team ;
                                };
                                if(nextPos==1)
                                nextPos+=1;
                                nextPos-=2;
                            }
                         }
        return 0 ;
        }
    }
    But why does all variables have one value if woord==1 .
    I thought that only the expression are carried out when woord=1

    Roelof

  9. #24
    spurious conceit MK27's Avatar
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    You set woord = 1 and then it never changes, so woord always == 1. Why do you think it's value should have somehow magically changed?
    C programming resources:
    GNU C Function and Macro Index -- glibc reference manual
    The C Book -- nice online learner guide
    Current ISO draft standard
    CCAN -- new CPAN like open source library repository
    3 (different) GNU debugger tutorials: #1 -- #2 -- #3
    cpwiki -- our wiki on sourceforge

  10. #25
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    Hello.

    I know that but if woord=1 i put in de code that only away_score get a value.
    Why do all the other get values and woord is still 1

    Roelof

  11. #26
    spurious conceit MK27's Avatar
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    Quote Originally Posted by roelof View Post
    Why do all the other get values and woord is still 1
    Let's look at all the places in that code where woord occurs:
    Code:
        int woord=1  ;
    Declaration and initialization, woord is assigned a value of 1. Nb. this has nothing to do with the fact that struct teamstats has a member named woord (maybe that is what's confused you?).
    Code:
                                cout << "woord : " << woord ;
    Outputing the value of woord will not change it.
    Code:
                                if (woord==1)
                                if (woord==2)
                                if (woord==3)
    Testing the value of woord will not change it either.

    Woord is not used anywhere else. Hence, woord is always 1. Again, the struct teamstats member "woord" is totally unrelated to "int woord" from main().
    C programming resources:
    GNU C Function and Macro Index -- glibc reference manual
    The C Book -- nice online learner guide
    Current ISO draft standard
    CCAN -- new CPAN like open source library repository
    3 (different) GNU debugger tutorials: #1 -- #2 -- #3
    cpwiki -- our wiki on sourceforge

  12. #27
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    Oke,

    That word is a member of teamstats is a error of me.

    What i mean is that if a run this programm the ouput looks like this :

    Woord : 1
    home_score : 20
    away_score : 20
    away_team : 20

    When I expect :

    Home_score :
    away_score : 20
    away_team :

    That is my question.

    Roelof

  13. #28
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    Hello,

    Problem solved on this way :
    Code:
     else
                            {
                                cout << "woord : " << woord ;
                                nextPos+=1;
                                if (woord==1)
                                {
                                    away_score = str.substr(nextPos, (prevPos-nextPos+1));
                                    cout << "tegengescoord :" << away_score ;
                                };
                                 if (woord==2)
                                {
                                    home_score = str.substr(nextPos, (prevPos-nextPos+1));
                                    cout << "eigen gescoord :" << home_score ;
                                };
                                 if (woord==3)
                                {
                                    away_team = str.substr(nextPos, (prevPos-nextPos+1));
                                    cout << "eigen gescoord :" << away_team ;
                                };
                                woord +=1;
                                if(nextPos==1)
                                nextPos+=1;
                                nextPos-=2;
                            }

    Roelof

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