A program in C language which satisfies all the requirements which are written below.

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Write a program which will read a bunch of integers from an input file, sort them, and print the sorted result to an output file.

You must read the input from input.txt and you must write the output to output.txt. The input will contain one integer per line, and you're expected to stop reading when you reach EOF. The output should also have one integer per line.

Warning: Do not print anything else to output.txt. Do not print prompts like "Please enter a number." The output should not contain anything other than the sorted integers, one per line.

If your input is something like this:

3
4
7
1
5
The output should be

1
3
4
5
7

You must be able to read the input from a file called input.txt in the current directory. You must be able to read the file in a format exactly as shown above - do not assume that any other information will be provided in the file or on standard input. You must write your output to a file called output.txt in the current directory. Do not write or print anything else into output.txt other than the expected answer.

For C/C++ programs, do not use non-standard include files like conio.h and do not use non-standard functions like clrscr or getch. Use only standard C. Do not print anything extra to stdout or to the output file (if any).

What I have tried:

Actually, I don't know much more of File Handling in C. I tried it but I failed for the exact output which I want, so asking for help.
Please help me with this, and I need the program in C language.

Posted 6-Jan-17 0:06am

Vrajesh Bhavsar

Updated 6-Jan-17 14:54pm

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Comments

Jochen Arndt 6-Jan-17 6:47am

If you show us what you have tried so far and tell us where you got stuck we will help.

But we will not do your homework.

The file handling is the simplest part of this assignment. I will tell you the functions that might be used so that you can look up them:
fopen, fgets and atoi or fscanf, feof, fprintf, fclose.

Vrajesh Bhavsar 6-Jan-17 6:53am

Buddy this is not my homework, I had taken part in an online competition but before that competition they give such questions. And I failed in solving this. Because I don't know File Handling. That's why asking for help.

Richard MacCutchan 6-Jan-17 6:56am

See https://www.google.co.uk/search?q=file+C.

Vrajesh Bhavsar 6-Jan-17 7:00am

I know theories based on it, and I'm in college's first year. And our teacher didn't teach us a single practical program of File Handling. So I don't know what to do in this, I am cleared with the logics behind the question but can't get it done with the program.

Richard MacCutchan 6-Jan-17 7:03am

So go to the link I gave you and start learning how to read and write simple text files. We are not going to do the work for you.

Vrajesh Bhavsar 6-Jan-17 7:05am

I read many examples related to my question and I understand many of that thing. So I am giving you my work, so will you complete my program?

Vrajesh Bhavsar 6-Jan-17 7:06am

#include<stdio.h>

void sort_func( int arr[], int size ){
/* make ur sort function */
}

int main(){
FILE *in = fopen("input.txt", "r"), *out = fopen("output.txt", "w+");

int intarr[100];
int no_of_int,i;

if(in != NULL){
for(no_of_int=0; !feof(in); no_of_int++)
fscanf(in, "%d", &intarr[no_of_int]);

sort_func(intarr, no_of_int);

for(i=0; i<no_of_int; i++)
fprintf(out, "%d\n", intarr[i]);
printf("process done!");
}
else printf("File not found!");
}

Patrice T 6-Jan-17 20:25pm

Use Improve question to update your question.
So that everyone can pay attention to this information.

Vrajesh Bhavsar 6-Jan-17 7:08am

So now please make me the sorting of the elements, i had also made the function also.

Richard MacCutchan 6-Jan-17 7:44am

No, we are not going to do your work, as it really will not help you. If you want to know ho to sort a set of values then use Google to find samples and tutorials. Get used to doing your own research and trying things for yourself; it really is the best way to improve your knowledge and skills.

Vrajesh Bhavsar 6-Jan-17 10:57am

I had submitted my program above, and I tried to add sorting but I failed in that. So can you help me with that? Other input and output work is done, so the remaining work is only to sort the numbers, I had also made the sort function so need to write the program under it only. If you could help with only this work, then it would be great. Thank you

Richard MacCutchan 6-Jan-17 12:50pm

Please edit your question, show the code that you have written and explain exactly what the problem is. I repeat, yet again, we are not going to write the code for you.

Vrajesh Bhavsar 6-Jan-17 12:53pm

ok buddy, I am posting a new one with my code ok. I had written the code but stuck in the middle.

[no name] 6-Jan-17 10:08am

"asking for help", so what is it that you need help with? No where in your posting is a question, a description of a problem, or a single line of C that you have written that demonstrates your problem.

No, this is not asking for help, this is asking us to do your homework for you.

Vrajesh Bhavsar 6-Jan-17 10:52am

I already said to two people that this is not my homework, if this was my homework then I should never ask for help on this site. And I always do my homework on my own. This question is from a Programming Competition asked in previous years and now I am participating in this so they give this program for practice work. And that's the only reason I am asking for help. I don't know File Handling practically, so asking for help, and I am not saying you to explain me the whole problem or the whole program, I can understand the whole program by my own. I had already done some of the work which you can see on the above's comment. I am not able to call the value and sort them. I am having the output of the same input so this program is running but I just need to add sorting in this in which I am failed.
I had also made the sort function in the program above. I had seen many solutions related to this question and from that only I was able to make such this program.
If you need proof that this is not my homework then you can tell me on my email id which is :- vrajeshbhavsar99@gmail.com. I will give you the screenshot of it.
Any help will be appreciated.

[no name] 6-Jan-17 12:27pm

Yes it IS homework, it's YOUR homework. Just because a teacher didn't assign it to you doesn't mean you don't have to do your work yourself.

AND you STILL haven't asked a specific question regarding the code you have written and you STILL haven't described a problem with the code you have written.

Vrajesh Bhavsar 6-Jan-17 12:33pm

Ok buddy, if you are thinking that it is my homework then you can.

and I had finished my code after this post so it hadn't described it with my post. but the code is in the above's comment you can get it from there buddy

[no name] 6-Jan-17 13:55pm

That's because it IS homework whether you think it is or not doesn't matter.

If your homework is done then what is your question? You aren't getting this asking a question or describing a problem thing are you? Despite all this back and forth and you reposting your code into another vague not-a-question asked posting, you just can't seem to ask a question or describe a problem with your code. Ever stop and think that maybe programming just isn't for you?

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Wendelius · Answer 1 · 2017-01-06T00:43:00

Solution 1

As this is obviously homework I think no one is going to give you full answer. Instead if you post specific questions, what you have done and in what you're stuck at I believe that you'll get help to those specific problems.

Remember that after all the point in the homework is that you learn and that can be achieved only by doing and solving. If someone else does all the thinking for you, you won't learn these things.

If you just put your mind into it I'm sure you start learning things quickly. :)

Posted 6-Jan-17 0:43am

Wendelius

Comments

Vrajesh Bhavsar 6-Jan-17 6:55am

This is not my homework, I had taken part in an online competition and in that they give a sample question which we need to solve. But I was failed in solving this because I don't know the File handling. If you could help then it would be great.

Vrajesh Bhavsar 6-Jan-17 7:07am

see here what I had done

#include<stdio.h>

void sort_func( int arr[], int size ){
/* make ur sort function */
}

int main(){
FILE *in = fopen("input.txt", "r"), *out = fopen("output.txt", "w+");

int intarr[100];
int no_of_int,i;

if(in != NULL){
for(no_of_int=0; !feof(in); no_of_int++)
fscanf(in, "%d", &intarr[no_of_int]);

sort_func(intarr, no_of_int);

for(i=0; i<no_of_int; i++)
fprintf(out, "%d\n", intarr[i]);
printf("process done!");
}
else printf("File not found!");
}

Wendelius 6-Jan-17 13:23pm

Seems that you already got the problem solved, that's great.

Concerning the deleted comments, I didn't take them as rude so don't worry about that :)

Jochen Arndt · Answer 2 · 2017-01-06T01:46:00

Quote:
Buddy this is not my homework, I had taken part in an online competition but before that competition they give such questions

There will be probably a reason for such questions. They want to see if you have some skills (or show you if your skills are sufficient for the competition). But it does not care. CodeProject is not a code writing service.

Quote:
Just now can't getting the sorting, how to do that, just tell me that now.

That is rather rude and will not increase the chance to get an answer.

Anyway, to be back on topic and let this qualify as an answer:

Entering something like "c sort algorithm" into a search engine of your choice should point you to the C standard library function qsort - C++ Reference[^] (don't be irritated by the C++ in the link, it is about C).

Patrice T · Answer 3 · 2017-01-06T14:54:00

You need to really learn C and C++ later, These links are very good lecture.

Here is links to references books on C and C++ by the authors of the languages. Note than C is the ancestor of C++, so knowing C is always useful with C++.
The C Programming Language - Wikipedia, the free encyclopedia[^]
https://hassanolity.files.wordpress.com/2013/11/the_c_programming_language_2.pdf[^]
http://www.ime.usp.br/~pf/Kernighan-Ritchie/C-Programming-Ebook.pdf[^]

C++ Programing Language[^]

A program in C language which satisfies all the requirements which are written below.

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