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Jul 21st, 2008

Re: urgent: modify code please

I don't want to modify your code. I want you to get smart enough to modify your own code.

If you can write out one record, you can write out a million records, but you can't write out records using incorrect data type specifiers. For instance, date of birth is an array, but you're trying to write it out as an int "%d". That won't work!

Why haven't you checked over these simple errors and fixed them by now? They're very basic, but you haven't done that.

Go through your program and find out specifically what does not work, and ask specific questions about it. If you don't know about something, ask about it, again specifically. We can't read your mind, and have no desire to re-write your code from top to bottom or replace a C programming text book. This is just a forum.

You're going to have to get a lot more actively involved if you want to get this program done right. There are three foundations to programming: Study, Work, and Practice. They will help you, pleading to God will not.

Adak

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Jul 21st, 2008

Re: urgent: modify code please

>>>If you can write out one record, you can write out a million records, but you can't write out records using incorrect data type specifiers. For instance, date of birth is an array, but you're trying to write it out as an int "%d". That won't work!

actually when i get some errors from my program then i modify program to simple things to make program easy to understand.
when i modified my program last time it was giving
DATE OF Birth="*OIW:FWFDW"
so i changed date of birth from string to integer that;s why it was "%d"
anyhow right now i am going to try to make my program done. by reading and creating my own logic
thanks for making me to try it myself instead of asking others to do it
but i will contact again if i got some problem.
Thanks alot for giving ur important Time

raja289

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Jul 22nd, 2008

Re: urgent: modify code please

C Syntax (Toggle Plain Text)
#include<stdio.h>
#include<string.h>
#include<conio.h>
#pragma warning(disable: 4996)
 
float avg(float x);
main()
{
    FILE *fp;
    int k,students=10,subjects=4,i,j,id_number,fail;
    float marks[100],total=0,average;
    char name[30],course_enrolled[30],filename[10],date_of_birth[30];
    /*printf("filename\n"); 
    scanf("%s",filename);*/
    fp=fopen("filename","w");
    for(i=1;i<=10;i++)
    {     
        printf("Enter Name of Student\n");
        fscanf(stdin,"%s",name);
        fprintf(fp,"%s\n",name);
 
        printf("Enter Course In Which Student Is Enrolled\n"); 
        fscanf(stdin,"%s",course_enrolled);
        fprintf(fp,"%s\n",course_enrolled);
 
        printf("Enter Date Of Birth\n");
        fscanf(stdin,"%s",date_of_birth);
        fprintf(fp," %s\n",date_of_birth);
 
        printf("Enter ID Number\n");
        fscanf(stdin,"%d",&id_number);
        fprintf(fp," %d\n",id_number);
 
        for(j=1;j<=4;j++)
        {
            printf("Enter Marks for Subject\n");
            scanf("%f",&marks[j]);
            total=total+marks[j];
            if(marks[j]<50)
                fail=fail+1;
            else
                continue;
        } 
        average=avg(total);
        total=0.0;
        printf("AVERAGE=%f\n",average);
        fprintf(fp," %f\n",average);
        if(average>=70)
            printf("Grade A\n");
        else if(average>=60&&average<70)
            printf("Grade B\n");
        else if(average>=50&&average<60)
            printf("Grade C\n");
        else if(average>=45&&average<50) 
            printf("Grade D\n");
        else if(average>=40&&average<45)
            printf("Grade E\n");
        else if(average<40)
            printf("Fail\n");
        else 
             continue;
 
 
 
 
        if(fail>=2)
           { 
                   printf("Student is failed and cann;t promote\n");
                   fprintf(fp,"Student is failed and cann;t promote\n");
           }        
        else
            continue;
        fail=0;
        fclose(fp); 
    }
    for(k=1;k<=10;k++)
    {
        /*printf("Input filename"); 
        scanf("%s",filename);*/
        fp=fopen("filename","r");
        fscanf(fp,"NAME= %s\tCOURSE ENTITLLED= %s\t ID NUMBER= %d\t DATE OF BIRTH= %s\tAVERAGE= %f\n",name,course_enrolled,&id_number,date_of_birth,average);
        fprintf(stdout,"NAME= %s\tCOURSE ENTITLLED= %s\t ID NUMBER= %d\t DATE OF BIRTH= %s\tAVERAGE= %f\n",name,course_enrolled,id_number,date_of_birth,average);
        fclose(fp);
    }
    getch();
}
float avg(float x)
{
      float a=0.0;
      a=(x/400)*100;
      return (a);
}
#include<stdio.h>
#include<string.h>
#include<conio.h>
#pragma warning(disable: 4996)
 
float avg(float x);
main()
{
    FILE *fp;
    int k,students=10,subjects=4,i,j,id_number,fail;
    float marks[100],total=0,average;
    char name[30],course_enrolled[30],filename[10],date_of_birth[30];
    /*printf("filename\n"); 
    scanf("%s",filename);*/
    fp=fopen("filename","w");
    for(i=1;i<=10;i++)
    {     
        printf("Enter Name of Student\n");
        fscanf(stdin,"%s",name);
        fprintf(fp,"%s\n",name);
        
        printf("Enter Course In Which Student Is Enrolled\n"); 
        fscanf(stdin,"%s",course_enrolled);
        fprintf(fp,"%s\n",course_enrolled);
        
        printf("Enter Date Of Birth\n");
        fscanf(stdin,"%s",date_of_birth);
        fprintf(fp," %s\n",date_of_birth);
        
        printf("Enter ID Number\n");
        fscanf(stdin,"%d",&id_number);
        fprintf(fp," %d\n",id_number);
        
        for(j=1;j<=4;j++)
        {
            printf("Enter Marks for Subject\n");
            scanf("%f",&marks[j]);
            total=total+marks[j];
            if(marks[j]<50)
                fail=fail+1;
            else
                continue;
        } 
        average=avg(total);
        total=0.0;
        printf("AVERAGE=%f\n",average);
        fprintf(fp," %f\n",average);
        if(average>=70)
            printf("Grade A\n");
        else if(average>=60&&average<70)
            printf("Grade B\n");
        else if(average>=50&&average<60)
            printf("Grade C\n");
        else if(average>=45&&average<50) 
            printf("Grade D\n");
        else if(average>=40&&average<45)
            printf("Grade E\n");
        else if(average<40)
            printf("Fail\n");
        else 
             continue;
        
        
        
        
        if(fail>=2)
           { 
                   printf("Student is failed and cann;t promote\n");
                   fprintf(fp,"Student is failed and cann;t promote\n");
           }        
        else
            continue;
        fail=0;
        fclose(fp); 
    }
    for(k=1;k<=10;k++)
    {
        /*printf("Input filename"); 
        scanf("%s",filename);*/
        fp=fopen("filename","r");
        fscanf(fp,"NAME= %s\tCOURSE ENTITLLED= %s\t ID NUMBER= %d\t DATE OF BIRTH= %s\tAVERAGE= %f\n",name,course_enrolled,&id_number,date_of_birth,average);
        fprintf(stdout,"NAME= %s\tCOURSE ENTITLLED= %s\t ID NUMBER= %d\t DATE OF BIRTH= %s\tAVERAGE= %f\n",name,course_enrolled,id_number,date_of_birth,average);
        fclose(fp);
    }
    getch();
}
float avg(float x)
{
      float a=0.0;
      a=(x/400)*100;
      return (a);
}

now the only problem with program is that
in last when i open the file to print all records of students on screen it just shows last student records ten time instead of each student .
thanks alot
waiting for reply

raja289

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Jul 22nd, 2008

Re: urgent: modify code please

Click to Expand / Collapse Quote originally posted by raja289 ...

just shows last student records ten time instead of each student .

Isn't that quite obvious if you take a close look at the loop,

(Toggle Plain Text)

for(k=1;k<=10;k++)
{
    // do this ten times ...

    // ask the user for the file name <-> shouldn't you 
    // open the file before this loop?
    scanf("%s",filename);*/

    // open the file, start reading from the very beginning
    fp=fopen("filename","r");
    
    // grab the information ...
    fscanf(fp,"NAME= %s\tCOURSE ENTITLLED= %s\t ID NUMBER= %d\t DATE OF BIRTH= %s\tAVERAGE= %f\n",name,course_enrolled,&id_number,date_of_birth,average);

    // and display it ...
    fprintf(stdout,"NAME= %s\tCOURSE ENTITLLED= %s\t ID NUMBER= %d\t DATE OF BIRTH= %s\tAVERAGE= %f\n",name,course_enrolled,id_number,date_of_birth,average);

    // now close the file <-> shouldn't you close the file after this loop?
    fclose(fp);
}

mitrmkar

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Jul 22nd, 2008

Re: urgent: modify code please

c Syntax (Toggle Plain Text)
#include<stdio.h>
#include<string.h>
#include<conio.h>
#pragma warning(disable: 4996)
 
float avg(float x);
main()
{
    FILE *fp;
    int k,students=10,subjects=4,i,j,id_number,fail;
    float marks[100],total=0,average;
    char name[30],course_enrolled[30],filename[10],date_of_birth[30];
    /*printf("filename\n"); 
    scanf("%s",filename);*/
    fp=fopen("filename","w");
    for(i=1;i<=10;i++)
    {     
        printf("Enter Name of Student\n");
        fscanf(stdin,"%s",name);
        fprintf(fp,"%s\n",name);
 
        printf("Enter Course In Which Student Is Enrolled\n"); 
        fscanf(stdin,"%s",course_enrolled);
        fprintf(fp,"%s\n",course_enrolled);
 
        printf("Enter Date Of Birth\n");
        fscanf(stdin,"%s",date_of_birth);
        fprintf(fp," %s\n",date_of_birth);
 
        printf("Enter ID Number\n");
        fscanf(stdin,"%d",&id_number);
        fprintf(fp," %d\n",id_number);
 
        for(j=1;j<=4;j++)
        {
            printf("Enter Marks for Subject\n");
            scanf("%f",&marks[j]);
            total=total+marks[j];
            if(marks[j]<50)
                fail=fail+1;
            else
                continue;
        } 
        average=avg(total);
        total=0.0;
        printf("AVERAGE=%f\n",average);
        fprintf(fp," %f\n",average);
        if(average>=70)
            printf("Grade A\n");
        else if(average>=60&&average<70)
            printf("Grade B\n");
        else if(average>=50&&average<60)
            printf("Grade C\n");
        else if(average>=45&&average<50) 
            printf("Grade D\n");
        else if(average>=40&&average<45)
            printf("Grade E\n");
        else if(average<40)
            printf("Fail\n");
        else 
             continue;
 
 
 
 
        if(fail>=2)
           { 
                   printf("Student is failed and cann;t promote\n");
                   fprintf(fp,"Student is failed and cann;t promote\n");
           }        
        else
            continue;
        fail=0;
        fclose(fp); 
    }
        fp=fopen("filename","r");
    for(k=1;k<=10;k++)
    {
        /*printf("Input filename"); 
        scanf("%s",filename);*/
        fscanf(fp,"NAME= %s\tCOURSE ENTITLLED= %s\t ID NUMBER= %d\t DATE OF BIRTH= %s\tAVERAGE= %f\n",name,course_enrolled,&id_number,date_of_birth,average);
        fprintf(stdout,"NAME= %s\tCOURSE ENTITLLED= %s\t ID NUMBER= %d\t DATE OF BIRTH= %s\tAVERAGE= %f\n",name,course_enrolled,id_number,date_of_birth,average);
    }
    fclose(fp);
    getch();
}
float avg(float x)
{
      float a=0.0;
      a=(x/400)*100;
      return (a);
}
#include<stdio.h>
#include<string.h>
#include<conio.h>
#pragma warning(disable: 4996)
 
float avg(float x);
main()
{
    FILE *fp;
    int k,students=10,subjects=4,i,j,id_number,fail;
    float marks[100],total=0,average;
    char name[30],course_enrolled[30],filename[10],date_of_birth[30];
    /*printf("filename\n"); 
    scanf("%s",filename);*/
    fp=fopen("filename","w");
    for(i=1;i<=10;i++)
    {     
        printf("Enter Name of Student\n");
        fscanf(stdin,"%s",name);
        fprintf(fp,"%s\n",name);
        
        printf("Enter Course In Which Student Is Enrolled\n"); 
        fscanf(stdin,"%s",course_enrolled);
        fprintf(fp,"%s\n",course_enrolled);
        
        printf("Enter Date Of Birth\n");
        fscanf(stdin,"%s",date_of_birth);
        fprintf(fp," %s\n",date_of_birth);
        
        printf("Enter ID Number\n");
        fscanf(stdin,"%d",&id_number);
        fprintf(fp," %d\n",id_number);
        
        for(j=1;j<=4;j++)
        {
            printf("Enter Marks for Subject\n");
            scanf("%f",&marks[j]);
            total=total+marks[j];
            if(marks[j]<50)
                fail=fail+1;
            else
                continue;
        } 
        average=avg(total);
        total=0.0;
        printf("AVERAGE=%f\n",average);
        fprintf(fp," %f\n",average);
        if(average>=70)
            printf("Grade A\n");
        else if(average>=60&&average<70)
            printf("Grade B\n");
        else if(average>=50&&average<60)
            printf("Grade C\n");
        else if(average>=45&&average<50) 
            printf("Grade D\n");
        else if(average>=40&&average<45)
            printf("Grade E\n");
        else if(average<40)
            printf("Fail\n");
        else 
             continue;
        
        
        
        
        if(fail>=2)
           { 
                   printf("Student is failed and cann;t promote\n");
                   fprintf(fp,"Student is failed and cann;t promote\n");
           }        
        else
            continue;
        fail=0;
        fclose(fp); 
    }
        fp=fopen("filename","r");
    for(k=1;k<=10;k++)
    {
        /*printf("Input filename"); 
        scanf("%s",filename);*/
        fscanf(fp,"NAME= %s\tCOURSE ENTITLLED= %s\t ID NUMBER= %d\t DATE OF BIRTH= %s\tAVERAGE= %f\n",name,course_enrolled,&id_number,date_of_birth,average);
        fprintf(stdout,"NAME= %s\tCOURSE ENTITLLED= %s\t ID NUMBER= %d\t DATE OF BIRTH= %s\tAVERAGE= %f\n",name,course_enrolled,id_number,date_of_birth,average);
    }
    fclose(fp);
    getch();
}
float avg(float x)
{
      float a=0.0;
      a=(x/400)*100;
      return (a);
}

still same problem !

sorry if there is any stupid mistake in code (please let me know)
thanks for helping Thanks alot

Last edited by Ancient Dragon; Jul 22nd, 2008 at 6:19 pm. Reason: add line numbers

raja289

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Jul 22nd, 2008

Re: urgent: modify code please

line 12: increase the array size of filename to 255 characters so that it can hold the maximum number of characters the operating system allows for a filename.

lines 13 and 14: uncomment those two lines.

line 15: remove the quotes around filename.

line 74: you close the file at the end of the first loop iteration. Move that line down after the }

Last edited by Ancient Dragon; Jul 22nd, 2008 at 6:26 pm.

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Jul 22nd, 2008

Re: urgent: modify code please

waiting and if anyone can chat with me on yahoo or msn please tell me i want to slove this code tomorrow i am from london now's it's 10 30 pm here

raja289

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Jul 22nd, 2008

Re: urgent: modify code please

raja289

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Jul 22nd, 2008

Re: urgent: modify code please

i did but now it displays a a message
"Enter your name"
but when i enter my name then it shows error

final1.c encountered a problem and need to be closed sorry for enconvience

raja289

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Jul 22nd, 2008

Re: urgent: modify code please

>>>>>line 15: remove the quotes around filename.
i removed quotes at line 15 and

>>>>line 74: you close the file at the end of the first loop iteration. Move that line down after the }
closed file after first for loop

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