C :: Read Specific Amount Of Data From File Until Terminating Set Is Reached
Jul 23, 2014
I wrote a code to read a specific amount of data from file until terminating set is reached. however the code does what its supposed to correctly until it reaches the 5th loop it justs stops responding. I've checked the reading file and all elements are correct in the file.
Code:
int main(void){
FILE *file1;
FILE *file2;
FILE *file3;
struct t test1;
struct t test2;
[Code] ....
Screenshot of program crashing:
Screenshot of reading file:
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Feb 25, 2015
I'm trying to make a program that allows the user to input an arbitrary amount of numbers and finding the largest of all the inputs but I keep having problems with the output.
javascript:tx('
#include <iostream>
using namespace std;
//******************************************
//CLASS COMPARATOR
//******************************************
class comparator {
public:
comparator();
[Code] .....
And regardless of what numbers I enter, I always get the output of 10. Also I got the EOF idea from my textbook so if there is a better way of doing this I'd like to hear it. I don't know any clear ways that looks nice to end the while loop when the user doesn't have any more numbers to enter.
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Mar 5, 2013
How do I make a specific character show up a specific amount of times?
Like I am generating a random number then I need to make "|" show up that many times on the screen.
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Apr 1, 2015
Im trying to read and store several students information so that i can have an options menu where i can enter a student number and the program prints all the information stored about that student. The way i have it set up now, doesn't work for this because all info is reinitialized to stud1. Is there another way to store this info other than defining stud1, stud2,.....,stud200?
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
struct student_info {
char first[20];
char last[20];
[Code]....
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Apr 11, 2015
Ok, so I am writing this program with 10 different functions, and one of those functions needs to count how many times 0 appears in a text file. I've done this before, but I am so stumped right now. Should I get the numbers from the 2d array I have, or should I just use the text file here? Here is what I have right now:
int toursMissed(int scores[][COLS]){
int counter;
for(counter=0;counter<=96;counter++){
if(scores==0){
counter++;
return counter;
}
}
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Aug 12, 2014
How would one go about doing this? I am very fond with Windows I/O, but not so much with this subject. I am decent with fstream, probably not as skilled at it as I should be, but I assume <fstream> would be a better choice, since it isn't locked to Windows.
Anyway, say I have a .txt file like this:
Bill is a cow.
Bill likes meat.
Bob is a pig.
Bob and Bill are friends.
And I want to count the number of times "Bill" is written. How would I do that?
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Nov 21, 2013
I have a .txt file which contains 121 lines,now I want to read the no 20 columns from that file. How to read it. I have tried the following code.
my c.txt file look like following :
A B C D E.....AAA
#include<stdio.h>
#include "conio.h"
#include "string.h"
int main() {
FILE *fp;
char a2[500];
[Code] ....
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Apr 14, 2013
What i try to do is to write a code which reads some specific values from a file and stores them in an array. My File looks like this
Code:
XFOIL Version 6.96
Calculated polar for: Myfoil
1 1 Reynolds number fixed Mach number fixed
xtrf = 1.000 (top) 1.000 (bottom)
Mach = 0.000 Re = 0.200 e 6 Ncrit = 4.000
}
[code]...
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Mar 17, 2013
Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <conio.h>
#define MAX 200
[Code] ....
Inside of my studentinfo.txt file
Code:
Jnh Has 2353325 23 56 72 34 67 22 46 42 5 23 56 23
Daniel Laurent 6744590 10 20 30 40 50 60 70 80 90 100 40 50
This code is working totally fine. Right now, I'm trying to update a specific data from the student info. Let's say I'm trying to update my student number of Daniel. So, in this case, I want to replace 6744590 to some other student number. I think I have to use fseek() or rewind() and use fputs() but, I don't know how I should decide where to look.
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Nov 28, 2014
I'm making a binary file that has 100 "empty spaces", and then I want to rewrite specific place with info, however it always writes the info at the end of the file, no matter what I try to get position before I call write() it tells me correct position...
#include <Windows.h>
#include <iostream>
#include <string>
#include <fstream>
#include <vector>
[Code].....
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Dec 23, 2013
A process is writing data continuously to a file . I need to stop the write operation if the file size has reached 1GB. Is there any way to check file size when it is opened for the write operation.
I could do the same using scripts. Can this be done using C Programming ?
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Oct 31, 2013
Client:
Code: ....
string cmd = "dir c:filequeue > ";
string outputFilePath;
outputFilePath.append(getTempPath());
outputFilePath.append(" est.txt");
cmd.append(outputFilePath);
system(cmd.c_str()); // dir c:filequeue > %temp% est.txt
string content = get_file_contents(outputFilePath.c_str());
send(s, content.c_str(), content.length(), 0); I'm executing the "dir" command to get a listing of Folders/files of one Folder. Then I read the Output of the file and send it over winsock to the Server.
Now, the Problem is, I don't know how I can handle the recv properly, cause I have to set the buffer size without knowing, how much data is actually transfered. Sometimes maybe no files are in c:filequeue, sometimes a 100k.
So I tried to make recv as a Loop:
Server:
Code: ...
while (rc != SOCKET_ERROR) {
printf("
#");
gets(buf); //please no discussion about gets, I will Change this later ;)
if (strcmp(buf, "ls") == 0){
send(connectedSocket, "LIST", 4, 0);
[Code] .....
now it works, but as the recv blocks, it will never leave the Loop, even when the Transfer is finished.What should I do?
I believe I could make unblocking sockets, but that's a bit complicated. Isn't there an easier solution, with malloc'ing the buffer or a Signal when to leave the recv Loop?
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Nov 28, 2012
I have to store large amount of data and retrieve the same data then write into file in C++. Currently I am using vector to store and retrieve. But vector is taking more time to store and retrieve the element. Is any other best data structure to store and retrieve large amount of data in unordered way?
Example code:
int I1 = 700,I2 = 32, I3 = 16;
//declare and resize the vector size
vector< vector < vector < vector<DOUBLE> > > > vPARAM;
vPARAM.resize(I1, vector< vector < vector<DOUBLE> > >
[Code] ....
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Mar 8, 2013
Code:
#include <stdio.h>
#include <stdlib.h>
int main (int argc, char *argv[])
{
char buffer[256];
FILE * myfile;
myfile = fopen("read.txt","r");
[Code]...
I also got an error in printing wherein the data in read.txt is "Hello" newline "World" and my program prints world twice.
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Apr 13, 2014
A Bookseller makes special discount for multiple orders of a book as follows:
AMOUNT and DISCOUNT as follows.
5-9 5% 10-14 10% 15-19 15% 20+ 20%
Write a C main function to read the amount of order from the standard input and compute and print the total price of the given order after the discount. Assume that unit price of a book is 10.00$
My problem is that.When i start with this
Code:
#include<stdio.h>
#include <stdlib.h>
int main(void)
{
int number;
float TotalPrice;
printf("enter a number:");
[Code] ....
I get 0 if i enter a number between 0 and 4(0 and 4 included). I don't know where I am doing a mistake. I also want to know if i can handle this buy just if statements. or how can i do it by while and for loops ?
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Feb 25, 2013
I wanna read a txt file like this
1.00518 2.01903 3.01139 4.01343 5.02751 5.99913 7.00011 7.99851 .....
and fill the array P[i][j] with the data.
I try to use
if (myfile.is_open()) {
//for (int i = 0; i < 1; i++)
//{
getline (myfile,DMArray[0]);
cout << DMArray[i] << endl;
//}
myfile.close();
}
But this read the data into a string. How should i do with this string. Besides I know the dimension of the data I am reading.
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Oct 30, 2013
My function is only reading the first line of numbers even though I have the loop to keep returning to it in main(). How do I have it read from the file until it runs out of data to retrieve?
File being read
90 83 94
72 65 81
File being sent the data(Only the second average is correct, working on the first)
Student Information
Student IDGradeAverageLetter Grade
1895612
90 83 94
289
90 83 94
#include <fstream>
#include <iostream>
using namespace std;
ifstream infile;
ofstream outfile;
void grades(int&,int&,int&); // Grades from the input file
int myavg(int,int,int); // Calculates the Average of the 3 grades
[Code] .....
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Dec 5, 2014
I am a member of a group still developing the Microprose European Air War game. We have the source code and permission to do this. As the code dates back to 1998 I use Visual Studio 2006.
I have written many programs in Visual basic, and have the following one to read the airbase value in the "targets.dat" file. The file has a four byte header containing the number of tatgets, and a 32 byte data block containing the data for each target.
Private Sub Command1_Click()
List1.Clear
Dim nt As Long
Dim a4() As Long
Open App.Path & " argets.dat" For Binary Access Read As 1
'read and display the number of targets
[Code] ....
Despite many attempts I cannot write the C equivalent of this code into the eaw.exe source. All I really need to know is how to open the 'targets.dat' file and how to get the value of a byte (or integer, or long) at a given position as in the "Get #1, k, a4(n)" line.
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May 7, 2013
i write this program and every things work correct except when i want to add data of file to the link list .when i add the data to the link list by add_to_linked_list() every things work correct but when i use read_linked_list_from_file() it doesn't work
Code:
#include <stdio.h>
#include <stdlib.h>
// double linked list structure
struct linked_list {
struct linked_list *next;
struct linked_list *prev;
char *value;
};
[code]....
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Nov 15, 2014
I am currently working on a problem where I read a file into a 2D array, and display data. If you saw my code earlier, this is the same problem, but I am now further along.
The file (90 characters) looks like this:
S
R
R
S
R
R
R
R
S
S
....
The "R" resembles rainy days, the "S" resembles sunny days, and the "C" resembles cloudy days. There are 90 characters in the file. The first 30 are for the month of June, the next 30 are for the month of July, and the last 30 are for the month of August. The 31st day of the months are NOT included.
I read the data into a 3 x 30 array, where the row indicates the month (0 = June, 1 = July, 2 = August) and the column indicates the number of days in each month.
Now I need to create a function that creates a report and displays, for each month AND for the whole 3 month period:
1) The number of rainy days
2) The number of cloudy days
3) The number of sunny days
4) Which of the 3 months had the largest number of rainy days
Here is my code so far:
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
const int MONTHS = 3;//Number of months
[Code] .....
There are no compiling errors, but I am not getting the data I want. My rCount and cCount variables end up being 0, and my sCount variable is 90.
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Feb 26, 2013
My program reads data from a txt file and it displays the test scores and the sum of the scores, and it also shows the max and min from the scores , so far only one number shows up from the scores instead 10 and i think my sum is wrong too, but i cant get the max and min to work ...
#include <iostream>
#include <iomanip>
#include <string>
#include <fstream>
using namespace std;
void openfile(ifstream &infile);
[Code] .....
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May 3, 2014
Assume you want to read from a file and place the data from the file into an array. The array can hold 10 integers. The file may contain any number of integers with 1 integer per line. Fill in the missing loop test condition so that we will read from the file until either end of file occurs or the array is full. Note we are using cin to read from the file since input redirection is being used.
cin >> temp;
arrayIndex = 0;
while ( _____________________________________) {
array[arrayIndex] = temp;
arrayIndex++;
cin >> temp;
}
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Jul 23, 2012
How to read a line with maximum of 8 bytes from a line in a file.
Let say line has 10248 bytes in one single line and same repeats for remaining lines in the file.
I need to read the first 8 bytes of a line and go on read the last 2 bytes of the line and repeat the till end of file.
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Oct 5, 2013
Okay, so my assignment for my C class is to generate a program that will allow the user to enter data for a stock and calculate the amount of stocks that ended up being positive, negative, and neutral.I tried to do this using one stock, here is my code;
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
Code:
void main()
{
float Neg;
float incst;
float shrs;
float bpps;
float crnt;
float crntcst;
float yrfes;
float pft;
float tpft;
}
[code]....
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Mar 25, 2013
I am trying to read an array values from Tmin.txt file. I take array size from user viz. number of raw & column and then, read the following data from Tmin.txt file which look like this:
20 40 20 25 30
20 30 40 20 25
20 40 20 25 30
20 30 40 20 25
30 40 40 30 40
I am using getline, and then converting it to int by using atoi. But my code is not working.
Code :
// reading a text file
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
[Code] ....
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Mar 31, 2014
For my intro to c programming class, our homework requires us to read a data file and emit various bits of information. the data file looks like this
#Domain: the URL
#Alexa: some kind ranking, small numbers are better
#Rank: another sort of ranking, big numbers are better
#Domain Alexa Rank Site Name
#------------ ----- ------- ---------
amazon.com 13 1177136 Amazon.com
google.com 1 4533883 Google
youtube.com 3 3637788 YouTube
[Code] ....
I've started and am able to get the correct number of lines, and the alexa number, but I keep getting some errors and am just unsure where to correct my code. This is what it looks like;
Code:
// Lexi Anderson
//CS 156
#include <stdio.h>
int main() {
[Code] .....
and once compiled, I get errors.
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