Why??

Discussion in 'C++' started by faizdead, Apr 26, 2012.

  1. faizdead

    faizdead New Member

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    Code:
    #include<iostream>
    #include<iomanip>
    #include<string>
    #include<fstream>
    using namespace std;
    
    struct student{
           char firstname[15],sirname[15],answer[25];
           long int metric;
           int mark;
           char grade;
    };
    
    char schanswer[]={"BACDACBDABBACADAABACABCDA"};
    
    int num=0;
    
    void calcmark(student tp2[]);
    int assigngrade(student tp2[]);
    
    int main()
    {
        student tp2[20];
        ifstream file;
        file.open("student.dat");
        if(file.fail())
        {
                       cerr<<"fail to open file"<<"student.dat";
                       exit(-1);
    }
    while(file>>tp2[num].firstname)
    {
                                   file>>tp2[num].sirname;
                                   file>>tp2[num].metric>>tp2[num].answer;
                                   num++;
                                   }
    calcmark(tp2);
    assigngrade(tp2);
    cout<<"\n"<<setw(11)<<"name"<<setw(9)
        <<"mark"<<setw(15)<<"grade"<<" \n\n";
    for(int i=0; i<num; i++)
       cout<<setw(8)<<tp2[i].firstname<<setw(8)<<tp2[i].sirname<<setw(8)<<tp2[i].mark<<setw(8)<<tp2[i].grade<<"\n";
       file.close();
       system("pause");
       return 0;
    }
    
    void calcmark(student tp2[])
    {
         int i,j;
         for(int i=0;i<num;i++)
         {
                 tp2[i].mark=0;
                 for(int j=0;j<25;j++)
                 if(tp2[i].answer[j]==schanswer[j])
                    tp2[i].mark+=4;
                 else
                    tp2[i].mark -=1;
                    }
                    }
    int assigngrade( student tp2[])
    {
         int i;
         char A,B,C,D,E;
         for(int i=0;i<num;i++)
         {
               
                 if
                 (tp2[i].mark>=75 && tp2[i].mark<=100){
                    tp2[i].grade='A';}
                else if
                 (tp2[i].mark>=65 && tp2[i].mark<=74){
                     tp2[i].grade='B';
                     }
                  else if
                 (tp2[i].mark>=55 && tp2[i].mark<=64){
                     tp2[i].grade='C';}
                  else if
                (tp2[i].mark>=45 && tp2[i].mark<=54){
                     tp2[i].grade='D';}
                    else {
                     tp2[i].grade='E';}
                  }
                
                  
                              
    }





    this is my coding..i need it to read more than 10 student..but the problem is when it comes to student number 9 and above,weird ouput were shown..why is it?can someone help me?

    this is example of the file..


    Siti Salleh 11111 BACDACBDABBACACDABCDABCDA
    Nuraini Ismail 11122 BBCCDDAABBCCDDAABBCCDDAAB
    Muhammad Hazim 11133 AAAAABBBBBCCCCCDDDDDABCDA
    Hafiz Hashim 11144 BACDACBDABBACADAABACABCDA
    Azhar Ruddin 11155 BABACDBBDCBACDBACDBACDABC
    Izzat Yong 11166 BAADAABDABBADACDCBCDABCAA
    Ros Lan 11177 BDCDACDBAABACDCAABDDCBCDD
    Sau Fi 11188B DCDACDDAABACDCAABDDCBCDD
    Muhai Min 11199 BDCBACDDAABACDBADBDDCBCDD
    Ci Kong 11100 ADCDBCDCAABBCBCAABDDCACAD
    Jun Bin 11200 BDCDDCDCBABBCBCABBADCACAD
     
    Last edited by a moderator: Apr 27, 2012
  2. xpi0t0s

    xpi0t0s Mentor

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    Please use code blocks when posting code.

    What is the weird output you see?
     

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