🚀 go-pugleaf

shekharpati@gmail.com wrote:
> hi all,
> I,m trying to read a space delimited file with the use of formated
> input through fscanf. But surprisingly i am able to read all the 4999
> lines of data except the "first line" which is giving random output(i.e
> not present in the file). the code is given below(the relevant part).
> 
> sample  input from the data file
> 01 48554.73828 504 30.48.37.001953 76.15.33.632813
> 2 48554.67969 504 30.48.36.722168 76.15.33.527344
> 3 48554.63281 504 30.48.36.442383 76.15.33.421875
> 4 48554.58594 504 30.48.36.162598 76.15.33.316406
> 5 48554.54297 504 30.48.35.882813 76.15.33.210938
> 
> the output(the first line)
> 18001844.273438 135633.742190 44.273438 30 5000 14
> 2 48554.67969 504 30.48.36.722168 76.15.33.527344
> 3 48554.63281 504 30.48.36.442383 76.15.33.421875
> 4 48554.58594 504 30.48.36.162598 76.15.33.316406
> 5 48554.54297 504 30.48.35.882813 76.15.33.210938
> 
> 
> I got this prob before when i was only reading the first two columns
> but as you might have noticed the leading '0' before 1 solved it.
> Surprisingly i can still read the first two columns correctly but the
> later ones are the ones that get of of hand. That too only in the first
> line. rest 4999  lines are read just fine. I cannot figure it out. plz
> help.its important
> 
> shashank
> (i am using borland c++ 5.5, win2000)
> _______________________________
> 
> fp=fopen ("TEMP31.TXT","r");
>    if (fp==NULL)
>     { puts("cannot open file");exit(1);
>      }
>    while ((fgetc(fp))!=EOF)

the above line will read and throw away the first character in the file, 
then the first character of each line read after the fscanf.

scanf is, in general, a very fragile way to read in data.

I generally use fgets to read the data into memeory, then parse it 
myself with real error checking, then assign values to vars.

scanf is ok for quick and dirty programs not meant to be used out side 
of a controlled environment.

>      {
> 
> fscanf(fp,"%d%lf%d%d.%d.%lf%d.%d.%lf",&x[a],&y[a],&fl_h[a],&latdeg[a],&latmin[a],&latsec[a],&longdeg[a],
>      &longmin[a],&longsec[a]);
> 
> printf ("\n%d %lf %d %d %lf %d %d %lf
> %d",x[a],y[a],latdeg[a],latmin[a],latsec[a],longdeg[a],longmin[a],longsec[a],fl_h[a]);//(here
> when i print it gives the correct values)
> 
>      if ((a%100)==0) {getch();} else{}
>      a=a+1;
>    }
> 
> fclose(fp);
> 
> getch();
> 
> for (i=0;i<AR;i++)
>     {
>      lat[i]=(latsec[i]+(latmin[i]*60)+(latdeg[i]*3600));
>      lon[i]=(longsec[i]+(longmin[i]*60)+(longdeg[i]*3600));
>      printf ("\n%lf %lf %lf %d %d
> %d",lat[i],lon[i],latsec[i],latmin[i],latdeg[i],fl_h[i]);// from here
> on i get junk value
> 
>       if ((i%100)==0) {getch();} else{}
>     }
>    getch();
> 
> 
> _______________________________
> 
> this is the starting code i.e the code before the above given prog
> segment, the initialisations and all (though i dont think it will be
> neccessary but just to be sure)
> 
> #include<stdio.h>
> #include<conio.h>
> #include<math.h>
> #include<stdlib.h>
> #define ARRAY 5000
> #define AR 4999
> #define PI 3.142857
> #define CONV 30.8333
> main()
> {
>   clrscr();
>   FILE *fp;
>   static int
> x[AR],latdeg[AR],latmin[AR],longdeg[AR],longmin[AR],fl_h[AR];
>   static double
> y[AR],longsec[AR],latsec[AR],lat_p[100],long_p[100],lat_m[100];
>   static double
> long_m[100],lat[AR],lon[AR],dist_p[100],dist_m[100],p[100],m[100],hp[100],
> 
> hm[100],lata,longa,latb,longb,latp,longp,latm,longm,dist_f,dist_i,pa,t,ta,tta,tta1,ttta,ttta1;
>   int a=0,b=0,c=0,d=0,e=0,ca=0,da=0,f=0,g=0,i,j,z,sl=0,sl1=0;
>   double
> sa=0.0,sa1=0,sb=0.0,sc=0.0,sd=0.0,se=0,sf=0,sg=0,sg1=0,sh=0,sh1=0,xa=0,xb=0,xp=0,xm=0,ya,yb,yp=0,ym=0;
>   static float fl_p[100],fl_m[100],fl_hp,fl_hm,fl_ha,fl_hb;
> _________________***********_______________
> 

Alex Russell