Read Text From File and Store in Array C#

01-11-2013

Hey everyone!

So i have a simple program that'due south supposed to read upwardly to 50 values from a .txt file, store the values in an array, and impress the values to the user. However, when I run the plan, it merely outputs nothing to the user..just a bare space, i don't run into any values.... i created the .txt file and saved information technology into "My Documents" on my reckoner so I'm pretty sure the program knows how to admission it....maybe there's some other mistake in my lawmaking that i'1000 not catching?

If anyone would like to aid, I would greatly appreciate your aid!!
Cheers

And here's my lawmaking:

Code:

/*Written by: Kalpana Chinnappan Date: January 17, 2013 Homework 1 */     #include <stdio.h>      int chief (void)  {     int nums[50];   //up to 50 element int assortment     FILE *fp1;      //file arrow     int i;      //******************  code starts hither ***************     for(i=0;i<50;i++)   //initialize array with 0         nums[i]=0;     i=0;        //make clean upward and initialize LCV     if ((fp1=fopen("votes.txt","r"))==Null)     {     printf("votes.txt failed to open\north");     return ane;     }     else         while((fscanf(fp1,"%d",&nums[i]))!=EOF) //scanf and check EOF         {             printf("nums[%d] is %d\northward",i,nums[i]);             i++;         }       return 0;  }

01-eleven-2013

Other so the fact that:

Lawmaking:

                      //******************  lawmaking starts here ***************     for(i=0;i<50;i++)   //initialize assortment with 0         nums[i]=0;

Can easily exist washed at initialization:

Code:

int nums[fifty] = {0};

There is nothing wrong with the code and as long every bit votes.txt is in the current directory the program is run from, should work fine. What are the contents of votes.txt?
Should be something like:

Lawmaking:

230 2398 34988 30489 9488 8598 34893 48984 34989 489 49848 58958 985

01-11-2013

See, working fine for me:

Lawmaking:

$ cat examination.c #include <stdio.h>    int main(void) {     int nums[50] = {0};     int i = 0;     FILE * fp;      if (fp = fopen("votes.txt", "r")) {         while (fscanf(fp, "%d", &nums[i]) != EOF) {             ++i;         }         fclose(fp);     }      for (--i; i >= 0; --i)         printf("num[%d] = %d\north", i, nums[i]);      return 0; } $ cat votes.txt  234 34 344908 3498 340823 402348 437 43297 43298 293847 348973 498724 28934  9349873 38947 34987 293847 293847347 48 $ ./a.out  num[18] = 48 num[17] = 293847347 num[16] = 293847 num[15] = 34987 num[14] = 38947 num[13] = 9349873 num[12] = 28934 num[11] = 498724 num[10] = 348973 num[9] = 293847 num[viii] = 43298 num[7] = 43297 num[6] = 437 num[5] = 402348 num[four] = 340823 num[iii] = 3498 num[2] = 344908 num[one] = 34 num[0] = 234

You should actually throw a i < fifty cheque in the while () condition too.

01-12-2013

Ohh ok, so I can but replace that whole "for" loop with:

Code:

                          int nums[50] = {0};

I dont know if i'll practise it, merely it should work both ways, thanks for showing me a simpler style

and actually, the contents are:

Code:

                                                  0 3 three ii 3 0 4 2 four 4 2 0 0 0 four 2 3 3 three 3 0 2 0 0 1 1 ane ii 3 four 4 0 3 4 0 0 3 three 4 four 4 four 0

OHHHH i simply saw your respond......maybe that's my problem, cause I didn't include the i<fifty in my while loop....thank you soooo much for helping out!! lemme go and meet if it works now!!!

01-12-2013

Like I said at that place is zilch in the code that is causing information technology to non piece of work. How are you executing information technology? Is it just running a quick popup window and so disappears?

Regarding your logic, if each numerical value represents a candidate then why not do something like this:

Code:

#include <stdio.h>  int main(void) {     int candidates[5] = {0};     int i;     FILE * fp;      /* note this has no l size limit every bit before.. */     if (fp = fopen("votes.txt", "r")) {         while (fscanf(fp, "%d", &i) != EOF) {             /* invalid vote (out of range */             if (i < 0 || i > v) {                 fprintf(stderr, "Invalid Candidate: %d!\n", i);                 proceed;             }              /* otherwise we got a valid vote, count it */             ++candidates[i];         }         fclose(fp);     }      for (i = 0; i < 5; ++i)          printf("Candidate #%d had %d votes\n", i, candidates[i]);      render 0; }

01-12-2013

ok let me meet if the lawmaking that u gave me works...and it just gives me the black running window with a blank space at where the values are supposed to be printed, and then:

"Process returned 0 (0x0) execution fourth dimension : 0.031 s
Press any key to continue."

idk whats wrong!!

01-12-2013

Read and Reply my questions, then peradventure y'all will effigy it out ?

01-12-2013

Welcome to the forum, kal!

Your file is not beingness opened. Your plan volition only work if the data file is moved or copied into the same directory that it is located in.

Not "My Documents". Must be the very same directory. You aren't seeing the error message, because the console window is endmost before you can see the message.

01-12-2013

@nonpuz

Ok and then you asked how I was executing it--I'g using codeblocks, only building and running the plan. Ok, and so I used the code you lot just gave me (the candidate i) and information technology'southward finally outputting some results!!! Thank you!! The only problem is that I demand the up to l size limit to however be in that location (because what if I accept more 50 numbers?), but i'll effort and figure that out on my own. As well, the output that i get is:

Candidate #0 had 0 votes
Candidate #1 had 0 votes
Candidate #2 had 0 votes
Candidate #three had 0 votes
Candidate #4 had 0 votes
Candidate #5 had 0 votes
Candidate #6 had 0 votes
Candidate #seven had 0 votes
Candidate #8 had 0 votes
Candidate #9 had 0 votes

Procedure returned 0 (0x0) execution fourth dimension : 0.031 s
Press any key to go on.

In my instance, at that place are just v candidates, so ignore the output stuff for "candidate five" to "candidate ix". Just wait at the candidate vote count until "candidate 4". Somehow it says that all v candidates got 0 votes...how practise I become the program to really print out the number of votes each candidate has? please give me slight hints, I'll endeavor to figure near of it out on my own, It wouldnt exist fair if u did my homework for me haha :P

01-12-2013

@Adak
Ohhhhh!! Wow cant imagine why I couldnt figure that out earlier haha! Thanks!!

01-12-2013

Ok then that tells me that its non reading anything from your file. Either the file is not in the directory or it is not readable or fscanf is failing. Put a "printf()" call right after the "fopen" call that just says "openned file successfully". Execute and run and come across if it outputs opened file successfully. If it does, then motility on and put a printf() telephone call in the while loop just before the ++candididate[i] line;

Read Text From File and Store in Array C#

reading from file and storing the values in an assortment!! Help PLEASE!! :O

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