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  • 1 Post By std10093
  • 1 Post By qny
  • 1 Post By jimblumberg

no ressult after compile and run?

This is a discussion on no ressult after compile and run? within the C Programming forums, part of the General Programming Boards category; Hi everyone, im new here and ive got this code. No error message but i cant get my ressult after ...

  1. #1
    Registered User
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    Sep 2012
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    2

    no ressult after compile and run?

    Hi everyone,
    im new here and ive got this code. No error message but i cant get my ressult after compile and run. System pause etc just show the message
    Syntax: programfile inputfile at the end.
    What i need to do so i can wright in the console year and average exam notes?
    thx for any help and sry for my english


    [tag]
    Code:
     
    Code:
    #include <stdio.h> #include <conio.h> 
    struct foitrec { 
    char fname[15]; 
    char lname[20]; 
    int year; 
    char exam; 
    int snote; 
    }; 
    
    
    void main(int argc, char *argv[]) { 
        
    FILE *fptr; 
    struct foitrec ftt; 
    float aver; 
    int count; 
    if(argc==2) { 
    if(fptr=fopen(argv[1],"r")) { 
    aver=0.0; 
    count=0; 
    while(fscanf(fptr,"%s %s %d %c %d",ftt.fname,ftt.lname,&ftt.year,&ftt.exam,&ftt.snote)!=EOF) 
    
    
    if(ftt.exam=='A' && ftt.year==1995) { 
                  
                     
    aver+=ftt.snote; 
    ++count; 
    } 
    aver/=count; 
    
    
    printf("Average=%f\n",aver); 
    
    
    } else 
    printf("Can't open file %s\n",argv[1]); 
    
    
    } else 
    printf("Syntax: programfile inputfile\n"); 
    
    
    
    
    }
    [/tag]

  2. #2
    SAMARAS std10093's Avatar
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    Welcome.Your code does not insert the body of the if you want..(line 30-35),because this conditions are true
    Code:
    if(ftt.exam=='A' && ftt.year==1995)
    So this has to do with the data or/and with how you wrote the code(the conditions,where you did put the printf etc)
    Gola likes this.

  3. #3
    qny
    qny is offline
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    You have to call your program with a specific filename as a parameter.
    If you're using a command shell, try
    Code:
    program filename.dat
    Gola likes this.

  4. #4
    Registered User
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    May 2010
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    The following snippet is not quite correct:
    Code:
    while(fscanf(fptr,"%s %s %d %c %d",ftt.fname,ftt.lname,&ftt.year,&ftt.exam,&ftt.snote)!=EOF)
    The fscanf() function only returns EOF if a failure ocurrs reading the first item. What happens if it reads the first item correctly but fails to properly read the second?

    Since you are trying to read 5 items you may want to insure that the function does indeed read all 5 items. This function also returns the number of items successfully read if it reads any data. So I actually recommend that you replace the EOF with the number of format specifiers, in this case 5.

    Jim
    Gola likes this.

  5. #5
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    Sep 2012
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    thank you guys for your replys,im working on it and ill post the right code in a few hours/days

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