C++ :: Getting Error In Ofstream File?
Nov 11, 2014
I am writing an eVoting program the addTally function adds 1 to the Candidate's voting tally when called and prints it back to the file from where it took the input replacing the old text. Now, Why I am getting error when running this program. Whenever i comment out the output file in addTally Function including where its used, it works.
Vote Function
void Vote(vector<int> &id_list, ofstream &voter_list) {
int ID;
bool valid_id;
char choice;
cout << " **** Voting Menu ****
[code]....
Function Adds one to the tally
void addTally(char choice) {
ifstream inCandidate("Candidates.txt");
ofstream outCandidate("Candidates.txt");
string Data_Line;
vector <string> Candidates;
string C_name[5];
int Tally[5];
[code]....
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Apr 22, 2013
so this is part of a larger project but here is a test file that I haven't been able to get running. I don't understand why the minute I put an ofstream object as an instance variable the program flips out.
#include <iostream>
#include "FileNotFoundException.h"
int main() {
using namespace std;
try {
std::cout << "This is a test.";
throw FileNotFoundException("Testing...");
[code]....
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Jul 22, 2013
I'm having a little problem with std:fstream - in my program, the user selects the location of a file which I want to remember. So, I have something like this:
Code: std::string fileLocation;
//Code here creates an 'open file' dialog box which lets the user choose which file to open.
//The string 'fileLocation' now contains the path to the chosen file.
std::ofstream prefs("prefs.txt");
if (prefs.is_open())
{
prefs << fileLocation;
prefs.close();
}
This works fine if the file chosen is in the same directory as the program, however, if they try to choose a directory outside of where the program is kept, it saves the text file into that directory instead of the same one as the program. So, it looks like outputting a directory into an ofstream actually changes the location to which the file is saved.
Is there a way to save the file directory to a text file using ofstream and still have the text file save in the same directory as the program?
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Feb 20, 2015
I'm trying to move a dictionary into a group of bite-sized files based off of the length of the strings in each file (I'm ignoring strings of length 1 for obvious reasons). Since I don't know what the longest word is (and I'm not going to look for it), and I don't want redundant files, I decided to use a vector of output file streams that I would put all the words into, but I can't get the file to open.
I took a look at it and found the failbit is 1, but the badbit is 0, so apparently it's a logic error on opening the stream [URL] .... I looked online and decided to try using pointers, but that didn't work either, so now I'm asking what the problem might be, because I can't think of any reason why it isn't working.
void createDictionary() {
//declare variables
string dictionaryName;//name of dictionary file
ifstream dictionaryIn;//file of original dictionary
vector<shared_ptr<ofstream>> dictionaryOut;//files where dictionary will be put based off of word length
string word;//input from the dictionary file
vector<int> lengths;//vector containing available lengths and their locations
unsigned long long counter = 0;
[Code] ....
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Apr 3, 2013
I am trying to use ofstream to write in a txt file in a function called recurrently. for a simplified example:
void func_write(double x) {
ofstream myfile;
myfile << "the result = " << x << endl;
} int main() {
ofstream myfile;
[Code] .....
To this stage, it does not work, because the myfile in func_write cannot write in the txt file opened in main function. I don't want to open, append and close the txt file each time the function is called, that will take more time to execute all (imagine with 500 calls).
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Jan 27, 2013
The following code writes to a file on either local disk to a remote disk (commented out code) on Windows 7 platform.
Code:
#include <iostream>
#include <fstream>
using namespace std;
int main () {
ofstream outfile;
[Code].....
The documentation does not specify what is a valid filename (path and filename). For example, will the "\server emp" path work on all operating systems to access a samba share? Does the constructor accept forward and backward slashes as folder separator on all operating systems?
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Jun 21, 2013
So the problem is that if you do launch << " Url = "http://google.com";
That C++ will detect that the second " is the end when really it isn't it is part of the VB script any way around this?
Then the second part that may be screwing this up is the // after the http.
Full code [URL] ....
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Aug 17, 2014
I'm trying to overload an operator << so that it prints to a .txt file. Would these two codes basically do the same thing? If so, which one is the more efficient one to use?
ofstream& operator<<(ofstream& fout, const Grid& g);
ostream& operator<<(ostream & out, const Grid& g);
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Apr 23, 2013
I've been working on a student data base that reads in the students name, birth date, social security, and department name (or major). I have all these items in the header files respectively; nameType, dateType, personType, and studentType.
I am now to create another header file called HWONEHEADER that contains the functions showMenu, loadStudent, insertStudent, searchByName, and SaveStudents. This is how far ive gotten
#ifndef HW
#define HW
#include <iostream>
#include <fstream>
#include <iomanip>
#include "studentType.h"
[Code] .....
Here is the cpp file i have.
int main() {
studentType department;
cin>>department;
cout<<department;
[Code] .....
I need with the HWONEHEADER using the ifstream and ofstream operators to load all the students information into a file called student.dat I'am extremely confused because i can't find anything in my textbook about using ifstream and ofstream operators.
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Nov 5, 2014
To generate output data, I'm printing a bunch of vector contents to files. Because the type of variable can differ between vectors, I wrote a templated printing function to print out whatever the content of the vector is. It looks like this:
template <class T>
void SomeClass::PrintVector(std::vector<T>& Values, std::string& outFile) {
std::ofstream out(outFile, std::ios::app);
[Code] ....
I added the fixed because some larger values were being printed in scientific notation. Everything works well. My test code includes 3 vectors of doubles and 3 vectors of unsigneds. All the unsigneds work well and two of the doubles work well, but the third doubles vector prints nonsense unless I disable the fixed.
The calling code is the exact same. I know the values in the vector are correct, because a) if I comment out the "fixed" flag it works, and b) one of the unsigned vectors is sorted based on the values in that double vector (after it is printed, so the sort cannot corrupt the vector print) and works perfectly.
The "nonsense" looks like chinese/weird characters, if that matters.
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Apr 25, 2013
I have to output a series of data, I have to control the width of parts of my data. like following:
double a[] = {1.0, 2.0, 3.0};
double b[] = {1.5, 2.5, 3.5};
ofsteam myfile("result.txt");
for(int i=0; i<3; i++) {
myfile.width(5);
myfile << i+1 << " : " << a[i] << " - " << b[i] << end;
}
I only want to fix the width of a[i], b[i], but let the rest to be output normally.
how I can make it?
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Nov 24, 2013
I have this code for a computer project... (store management) but the character strings are not copied on text file..
#include<iostream.h>
#include<conio.h>
#include<fstream.h>
class Store {
public:
char *item_name[5];
store()
[Code] .....
Now when i run the program, it gives a error :::
ERROR
address 0x0
How can i write these strings to the text file?
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Apr 12, 2014
I am working on an assignment in which i have to perform th following task
myClass itsObject1,itsObject2;
itsObject2=5000+itsObject1;
I have defined overloaded operator as follows in the header file but in the cpp file of the class it gives error.
friend vli &vli::operator + (int &a,vli &obj);
How to define it in cpp file of my class?
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Mar 27, 2015
I have a function in one src file called from code in a different src file.
In ig_cfunc.cpp
Code:
#include "ig_tools.h"
int x2_count = 0.0;
float rel_branch_degree_tmp = 0.0;
string type;
vector<int> is_disp_type;
[Code] ....
I am getting a linker error,
Code:
ig_cfunc.cpp:1609: error: `calc_rel_branch_degree' undeclared (first use this function)
I have deleted all of the objects and recompiled to make sure that everything is in sync. I can't see what the issue is here and I'm not sure what to do next. This code actually worked until I changed the name of the function, so the types are all correct and such. This is the format I use for all external functions ....
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Jul 10, 2013
Why I am getting an error (-1) when trying to write to a file. Here is the function - I did not include the rest of the code - not sure if I am leaving anything else out - I assumed it was a write permission issue?
Code:
#defineDATAFILE "/var/chance.data" //File to store userdata
voidregister_new_player() { int fd;
printf("-=-={New Player Registration } =-=-
");
printf("Enteryour name: ");
input_name();
[Code] .....
Result
Code:
user@ubuntu:~/examples$./game_of_chance
-=-={New Player Registration } =-=-
Enteryour name: test
[!!]Fatal Error in register_new_player() while opening file:Success
user@ubuntu:~/examples$
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Sep 5, 2014
it isn't actually writing anything to the file. It is opening the employeesOut.txt file but not writing anything. I'm getting the error
libc++abi.dylib: terminating with uncaught exception of type std::invalid_argument: stoi: no conversion
(lldb)
I believe the error is within my main.cpp, so here that is, I have multiple classes.
#include <iostream>
#include <string>
#include <fstream>
#include "Employee.h"
using namespace std;
bool openFileForReading(ifstream& fin, const string& filename);
[code]....
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Jan 31, 2013
In c++ ., I am getting unable to get obj file error first time i compiled i got the output but during the 2nd time i got this error .....
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Sep 27, 2014
what can i do to fix ? why do i get the error ?
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Feb 6, 2013
I am working in Eclipse, and it keeps giving me this error that I do not understand. In the fillTable function, "is >> kP[i]" Eclipse says: no match for 'operator>>' in 'is >> *(((TranslationTable<int, std::string>*)this)->TranslationTable<int, std::string>::kP + (+(((unsigned int)i) * 8u)))'.
#ifndef TRANSLATIONTABLE_H_
#define TRANSLATIONTABLE_H_
#include "KeyValuePair.h"
#include <iostream>
#include <cstdlib>
[Code]....
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Jun 19, 2013
Here is my code i wrote for storing details of my apps.
#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
struct app {
int id;
char name[200];
[Code] ....
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Nov 8, 2014
ofstream infile;
infile.open("Input.txt");
if(infile.fail()) {
cout << "Error Opening File in Input" << endl;
system("pause");
exit(1);
}
So I'm trying to see if it fails, but if i change "Input" name would the computer just create a new file name of it for example if i change "Input" to "asdf" the computer is just going to create "asdf" how do i fix it.
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Apr 21, 2014
I have been working a while with saving and retrieve structs, and I still have not got it to work. I get Segmentation fault sh "${SHFILE} . I have search this error, and it has something to do with memory, but what, since I am a beginner with saving and retrieving files. The project runs fine, and the error stated above outputs into my console window as text.
Here are my two structs:
struct checkbook {
char id[50];
double value[50];
};
struct fbook {
[Code] ....
Here is how I save and retrieve my structs:
void saveCheckbook (string file, checkbook checkbook, double initial, int counter) {
string path = "C:UsersAshwinGoogle DriveC++Checkbook" + file;
fbook save;
save.counter = counter;
save.initial = initial;
save.book = checkbook;
[Code] ...
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Oct 31, 2014
// This is my actionlink on the index view
@Html.ActionLink("Download File", "Download", new { fileName = Model.OriginalRecordRelativeFilePath })
// This is my file download method at the controller file
public FileResult Download(string fileName)
[Code] ....
I want to get the file named path from C:DataIntergrationInterfacepath. I linked the path with file name. But i get this error System.IO.FileNotFoundException: Could not find file 'C:DataIntergrationInterfacepath when i click the actionlink.
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Mar 21, 2013
I program unix sokcet programming , and part of my code is ti open file from server and open it , but i surprised with this wierd error i dont have any reason for it ?
Code:
#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
[Code] ....
File name is : myHeader.h
myHeader.h:24:1: error: unknown type name "File"???
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Jan 31, 2014
I am trying to use struct to store variables from a text file and use them in the main program. I have first tried running the program without using struct and declaring the variables within the main program and it runs fine. But after using struct, it gives no compilation error and a segmentation fault as output. Also, if the size of file/variable size is unknown can I declare variables as char string[]??
The code is as below:
Code:
#include<stdio.h>
struct test {
char string1[10000];
[Code].....
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Dec 3, 2013
Code:
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int encrypt_data(FILE *);
[Code] ....
I am trying encrypt the file "encrypt" when I enter it I get "Error in reading file"
I think its a problem with the fgets() and scanf()...I tried both fgets out and then scanf but I get the same error.
I look in the directory and see that when I enter a file to be encrypted a blank file with a "?" at the end is created in the directory. so I try to encrypt "encrypt" it shows error then creates "encrypt?"
I then tested it by entering a random file name that does not exist
EXAMPLE
Please enter file to be encrypted: fakefilename
Error in reading file.
I look in the directory the non existent file now is listed "fakefilename"
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