C++

Forum

 
Printing contents of an input file to the screen

babe20042004 (9)
My program is supposed to read from this output file and print the contents to the screen NOTHING IS BEING PRINTED:

CPTR151‐01
000143 Doe John Q 10 5
000143 Doe John Q 10 7
000143 Doe John Q 10 9
000143 Doe John P 20 17
000143 Doe John P 20 15
000143 Doe John M 50 45
000143 Doe John F 50 40
991253 Dough Jane Q 10 10
991253 Dough Jane Q 10 6
991253 Dough Jane Q 10 2
991253 Dough Jane P 20 20
991253 Dough Jane P 20 7
991253 Dough Jane M 50 35
991253 Dough Jane F 50 47.5

I have a read until end of file command and all the necessary other commands.
I read in the first id number as Student_id and then if the id is not equal to the new id read in then it calculated the grades for the student and outputs it to the screen and then continues to read the rest of the data entered.
This is what I have for that section of code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
  myfile>>New_id;

  if(Student_id!=New_id)
{

        quiz.Average=quiz.Tot_Ach/quiz.Tot_Poss;

        prog.Average=prog.Tot_Ach/prog.Tot_Poss;

        Poss_Score= quiz.Tot_Poss+prog.Tot_Poss+mid.Tot_Poss+fin.Tot_Poss;

        Acheived_Score=quiz.Tot_Ach+prog.Tot_Ach+mid.Tot_Ach+fin.Tot_Ach;

        Per=(Acheived_Score/Poss_Score)*100/1;

        cout<<Firstname<<" "<<Lastname<<endl;
        cout<<"Quiz Average: "<<quiz.Average<<endl;
        cout<<"Programming Average: "<<prog.Average<<endl;
        cout<<"Final Percentage: "<<Per;
}
}
return 0;
}
}


This is all of my code just in case
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
 
#include<iostream>
#include<string>
#include<fstream>
using namespace std;

struct Type
{
 double Poss_Score;
 double Acheived_Score;
 double Tot_Poss;
 double Tot_Ach;
 double Average;
}quiz,prog,mid,fin;

int main()

{

 string Course_Name;
 int Student_id;
 int New_id;
 string Lastname;
 string Firstname;
 char Assignment_Type;

 double Poss_Score;
 double Acheived_Score;
 double Per;

 //Section 1- This section reads the information from the input file and assigns appropriate variable names.
 ifstream myfile;
 myfile.open("student_info.dat");


while(!myfile.eof())
{


        getline(myfile,Course_Name);

        myfile>>Student_id;

        myfile.get();

        myfile>>Lastname;
      myfile.get();

        myfile>>Firstname;
        myfile.get();

        myfile>>Assignment_Type;


        switch(Assignment_Type)
        {
                case 'Q':
                        myfile>>quiz.Poss_Score>>quiz.Acheived_Score;

                        quiz.Tot_Poss+=quiz.Tot_Poss;
                        quiz.Tot_Ach+=quiz.Tot_Ach;
                break;

                case 'P':
                 myfile>>prog.Poss_Score>>prog.Acheived_Score;

                        prog.Tot_Poss+=prog.Poss_Score;
                        prog.Tot_Ach+=prog.Tot_Ach;
                break;

                case 'M':
                        myfile>>mid.Poss_Score>>mid.Acheived_Score;

                        mid.Tot_Poss+=mid.Poss_Score;
                        mid.Tot_Ach+=mid.Acheived_Score;
                break;

                case 'F':
                while(!myfile.eof())
{


        getline(myfile,Course_Name);

        myfile>>Student_id;

        myfile.get();
myfile>>Lastname;
        myfile.get();

        myfile>>Firstname;
myfile.get();

        myfile>>Assignment_Type;


        switch(Assignment_Type)
        {
                case 'Q':
                        myfile>>quiz.Poss_Score>>quiz.Acheived_Score;

                        quiz.Tot_Poss+=quiz.Tot_Poss;
                        quiz.Tot_Ach+=quiz.Tot_Ach;
                break;

                case 'P':
                 myfile>>prog.Poss_Score>>prog.Acheived_Score;

                        prog.Tot_Poss+=prog.Poss_Score;
                        prog.Tot_Ach+=prog.Tot_Ach;
                break;

                case 'M':
                        myfile>>mid.Poss_Score>>mid.Acheived_Score;

                        mid.Tot_Poss+=mid.Poss_Score;
                        mid.Tot_Ach+=mid.Acheived_Score;
                break;

                case 'F':
                        myfile>>fin.Poss_Score>>fin.Acheived_Score;
        myfile>>fin.Poss_Score>>fin.Acheived_Score;

                        fin.Tot_Poss+=fin.Poss_Score;
                        fin.Tot_Ach+=fin.Acheived_Score;
                break;

                default:cout<<"Invald Input";

        }
        }

  myfile>>New_id;

  if(Student_id!=New_id)
 {

        quiz.Average=quiz.Tot_Ach/quiz.Tot_Poss;

        prog.Average=prog.Tot_Ach/prog.Tot_Poss;

        Poss_Score= quiz.Tot_Poss+prog.Tot_Poss+mid.Tot_Poss+fin.Tot_Poss;

        Acheived_Score=quiz.Tot_Ach+prog.Tot_Ach+mid.Tot_Ach+fin.Tot_Ach;

        Per=(Acheived_Score/Poss_Score)*100/1;

        cout<<Firstname<<" "<<Lastname<<endl;
        cout<<"Quiz Average: "<<quiz.Average<<endl;
        cout<<"Programming Average: "<<prog.Average<<endl;
        cout<<"Final Percentage: "<<Per;
}
}
return 0;
}
}
Last edited on
Zhuge (4664)
What is the problem? And don't double post please.
babe20042004 (9)
The problem is that the output wont print to the screen. When compiled the program doesnt have any errors it's just that it wont output to the screen.
Topic archived. No new replies allowed.