C/C++ :: Error Handling For File Opening And Reading
Apr 23, 2014
I am writing to write a program and performs the following tasks
- Reading a file (txt file contains some temperature values)
- Display the temperature values (contents of the file)
- Calculating the average of the temperature values in the file.
- finds the maximum and minim value of temperature in the file.
The program is user interactive and waits for the user input and process according to his input (choice)
I have managed to complete the program and covered all the expect except the error handling for file opening and reading, although I have managed to do it for the part one part (i.e for the choice == 1)
I can repeat it for the other choices (i.e for 2, 3 ) but I do not want to repeat the code and do it in a different function or do it once for all. While making an attempt I can not handle the rest of the program and all the program turns into a mess.
#include <iostream>
#include <fstream>
#include <iomanip>
int menu();
int myChoice(char);
char inputValidating();
[Code] .....
Need Error handling for file opening and Reading that is used once, So far I have managed to do it for choice 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.
I'm attempting to write a method that opens a file from Excel, finds a value within the spreadsheet and returns the value from another column along that row.
So I know I want to pass in the filename and the item I'm initially searching for, plus also a column identifier and that way I can locate so something like this:
public static int GetParameter(string filename, string parameter, string channel)
I've attached a snip of the spreadsheet so you can see what I'm lokoing at. I want to open the spreadsheet, find the parameter I've specified, move along the column to find the channel I've specified and finally read and return the value.
The bit that's troubling me is I have no idea how to work with excel in c#. I've done a few searches and I believe I need to add thiese references
using DocumentFormat.OpenXml.Spreadsheet; using DocumentFormat.OpenXml.Office2010.Excel; using DocumentFormat.OpenXml.Office.Excel; using Excel = Microsoft.Office.Interop.Excel; using Excel;
I have added those usings and also made reference to them in my project. I was also looking at this as well but it just confuses me in how I add my parameters and modify the code to suit:
using System; using System.Windows.Forms; using Excel = Microsoft.Office.Interop.Excel; namespace WindowsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent();
I'm in a CIS 143 class which is Introduction to Programming using C++. We've been assigned a lab with little to no detail on how to do the things listed.
The purpose of this lab is to practice the file input and output concepts. For this lab you may assume that the input files exist and contain appropriate data inside of them.
Four separate text files* which contain the following lines, different for each file.
(*: This isn't on the lab, but don't worry about what the name, age, id, and major are. those can be random and I can just change them what they need to be)
Name Age Student ID Number Major
Your program should ask the user which of the four input files they would like to open, and then read the contents from the file. Once the contents have been read in, it should output to both the screen and a file named "output.txt" the four values were read in, arranged as follows:
"Hello <name>! You are a <age> years old <major> student, and your ID number is <ID number>"
Now I am by no means saying "Do it for me". I just need to know how to have a user type file1, file2, file3, or file4, and then have the program open that file, then have the output.txt file arrange the wording into the sentence above.
This is what I have so far and I don't think it is anywhere near correct:
#include <iostream> #include <fstream> #include <string> using namespace std; int main() { ifstream inFile; string file1; string file2;
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)))'.
I have been using a Boost NonCopyable library in Microsoft Visual Studio 2013.
What I have is the following error message:
Error1error C2280: 'boost::noncopyable_::noncopyable::noncopyable(const boost::noncopyable_::noncopyable &)' : attempting to reference a deleted functionc:usersjohndocumentsvisual studio 2013projectsdonttreaddonttreaddonttread.cpp181DontTread
Now what I want to rectify the error is to throw an exception, so that the program can compile smoothly.
I have written this code for predictive parser. It is working for valid input but it is not working for invalid input when i give invalid input it says its valid. How to do error handling in predictive parser.
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"
I am using OpenCASCADE environment to read STL file! I face a problem, with forward declaration error with the following
void StlReadIn::STL_Import() { std::string FileName; std::cout<<" Enter the file name "; std::cin>>FileName;
[Code] .....
Error message:
stlreadin.cpp:26:47: error: invalid use of incomplete type ‘struct StlMesh_Mesh’ /usr/local/oce-0.9.1/include/oce/Handle_StlMesh_Mesh.hxx:23:7: error: forward declaration of ‘struct StlMesh_Mesh’
Below is the code for reading a struct that was stored in a binary file. Problem is while reading from file I get the name without first character and age is always equal to zero which it should not be.
I finished my Enigma cipher simulator...how should I write the error handling code? Should I throw an exception in main, or in the Enigma ctor and Encrypt() fn when the user enters a non-alphanumeric character?
im trying to read employee information from a file using structures but im having problems with getting the file to open and read in the information
Code:
Write a programt that inputs (at most 50) records from a sequential file #include <stdio.h> #include <stdlib.h> struct employee // employee structure definition }
I have this image/video compression project that is to be done in C. I've been given this source code by my supervisor which is supposed to be a working one.
Assuming I have a sequence of 5 images in .pgm format (image41.pgm, image42.pgm .... image45.pgm). Some of the code involved is
When I tried to compile the code using make file (shell script), I got this error message "In function 'readPgm' format '%d' expects argument of type 'int *', but argument 3 has type 'unsigned char *' "
Can identify what the problem is and how to rectify it?
I'm new in programming, and trying to write a code in C. The requirement is following - to write a text, and to find frequency of 1 chosen character in it. The main thing is that program should check user input (for example, I want to check if user entered "char" --> then correct, or if entered "int" --> not correct). But the program still doesn't check. So I have:
Code: #include <stdio.h> int main(){ char c[1000], ch; char i, count=0; printf("Enter a text: "); gets(c);
Error Message: $ ./dirsearch ~/Documents/College/textfiles/ [..] [yomama.txt] Error : Failed to open entry file - No such file or directory
Here are my current file permissions: textfiles$ ls -l total 8 -rw-rw-rw- 1 jav jav 7 Apr 26 13:14 moretext.txt -rw-rw-rw- 1 jav jav 10 Apr 26 12:38 yomama.txt
How to open a file and just print what is in that file on the screen. I though maybe I had the directory wrong but putting G: or G: give me the same result. When I select 1 it just goes to the next line and doesn't print anything.
Code: int getchoice(void) { int num; int choice; FILE* outputfile;
