C++ :: Saving Array Data Into Text File
Dec 4, 2013
I have a program that saves all information temporarily into memory (into the array), however, I need a permanent save solution. I have the full program working correctly, formatted perfectly, but it's missing the file array to file output.
Essentially, whenever I'm presented with the menu I'll be able to add entries, search by last name, show the entire list, and exit and save. Whenever I select option 4 the program should save to a file "address_book.txt". Whenever I reload the program, it should load from "address_book.txt" and populate the array with the preexisting data.
My question is focused on how and where I should implement the file output. What I have thus far:
#include <iostream>
#include <string.h> //Required to use string compare
#include <fstream> //Eventually used to store array into file
using namespace std;
class AddBook{
[Code] ....
View 5 Replies
ADVERTISEMENT
Sep 2, 2013
how to save text stored in an array to a txt file. can sum1 how to save the text in an array to a file/txt file......
View 7 Replies
View Related
Jan 26, 2015
I started with C# 2 days ago, but i have made 3 "games". Its something like Cookie Clicker, very simple and very easy.
But I have problem with saving the game. I want to save values of variables to text file when i click on button, and when i click on another button i want to values of variables load. Just simple save system. How it works and so.
View 8 Replies
View Related
Apr 24, 2015
I'm very new to c and c++ and am currently working on a Caesar cipher that grabs encrypted text from a txt file and decrypts it onto a new txt file. My code builds fine in CodeBlocks and when I run it, there is a new txt file created but it stays blank.
#include <iostream>
#include <fstream>
#include <string>
#include <stdlib.h>
#include <cstdlib>
using namespace std ;
int main(int argc, char *argv[]){
[Code] ....
View 7 Replies
View Related
Jan 17, 2013
The process cannot access the file because it is being used by another process.
How can i edit CStdioFile to let me open the file while the program is running.
View 2 Replies
View Related
Sep 13, 2013
I have a problem when i try to save unicode to a .txt file.
I need to store in a file names that will have letters like "ăĂâÂșȘțȚîÎ"
wchar_t name []=L"ăĂâÂșȘțȚîÎ";
FILE* fang;
fang= _wfopen( L"test.txt",L"wt+,ccs=UNICODE");
fwprintf (fang, L"%ls ",name);
When i open my text file i get this: ??âÂ????îÎ
if i use
fang=fopen("test.txt","a");
I get the same result
and for
fang=fopen("ang.txt","a,css=UNICODE");
I get a runtime eroror "invalid file open mode"
View 2 Replies
View Related
Jan 6, 2015
I need to save RGB values of each pixel in a 3D array A[width][height][3]. I found a code online that transfers the bytes into an array but I cant understand how bytes are saved them so i could transfer them into an array. The truth is I dont know much about working with images at all so i have a problem working on them. How to transfer the RGB data from an .jpeg image into a 3D array? This is my code so far:
#include <iostream>
#include <jerror.h>
#include <jpeglib.h>
using namespace std;
int main(){
FILE *pic = fopen( "image.jpeg", "rb+" );
[Code] .....
View 6 Replies
View Related
Jul 18, 2013
I am working on a project that uses a web service to extract a PNG image from a web server and save it on a local machine. It's done via a system call. I can get the output of the system call to a FILE but it appears to be losing data, most notably the PNG chunk names (IHDR/PLTE/IDAT/IEND, notably). (Unfortunately piping the output to an exterior file does not work through a system call.) The end result is ~6KB smaller than the file I am intending to retrieve.
This is the code I'm using (adapted from other material I found via searches here):
ofstream png;
png.open(/*outputfile*/, ios::binary);
FILE* fp = _popen(/*SYSTEMCALL*/, "rb");
string responseString;
if(fp != NULL) {
char a[100];
while(!feof(fp)) {
fgets(a, 100, fp);
responseString += a;
}
}
_pclose(fp);
png << responseString;
Am I missing something or just doing it wrong?
View 11 Replies
View Related
Jan 25, 2015
I am currently working on a project that requires me to "load the data in the file into array at the beginning of the program."
I have a text file with data, and I need to populate an array with the information. From then on, I am supposed to be able to add, display, and search that array. However, I can't figure out how to add the data from the file into an array. I was trying to find out how to search the text file itself. So it threw me off balance and I've been staring so long at the screen I can't really focus.
View 7 Replies
View Related
Feb 12, 2013
I am suppose to make a program that reads in data from a text file (integers only) and sorts them as it inserts them into an array of size 10. I did this using an insertion sort, which worked great. But now I am being told that I need the function has to read ALL of the numbers in the text file, not just the first 10, and I am not allowed to store them THEN sort, it has to be sorted as being stored.
This is what I have for sorting first 10
void sortArray(int iArray[])
{
string fileName = "";
fstream inFile;
int tmp = 0;
[Code]....
View 3 Replies
View Related
Mar 16, 2015
I know how to save/open files but im just confused on where to write the code for it in this block of code :
#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>
using namespace std;
const int NUM_MONTHS = 12;// Number of months
const int NUM_CATEGORIES = 6;// Number of categories
[Code] .....
View 5 Replies
View Related
Feb 8, 2013
I am using fin.peek() to read character from input file and saving each character into an array. Each line from the input has first name, last name, id number, and then 5-6 grades. Random spacing between each one.
input file example:
Adam Zeller 45678 80 87 60 90 88 100
David Young 34521 34 56 76 76 76 76
Carl Wilson 909034 90 90 90 49 39
my code for reading in and storing each character is this:
while(fin.peek() == ' ')
fin.get();
while(fin.peek() != ' ') ///// first name {
c = fin.get();
first[i] = c;
[Code] ....
The problem I am having is what sort of loop would go around this to read till end of file. I have tried eof. I have tried while(!fin.peek == ') and I have tried a couple of other methods. these methods resulted in a never ending loop execution.
View 1 Replies
View Related
Apr 19, 2013
I want to input data into text file while not deleting the original data in the file and I use something as
ofstream writefile;
writefile.open("example1.txt");
if (writefile.is_open()) {
for(j=0; j<N; j++) {
[Code] ....
But this will delete the original data.
View 3 Replies
View Related
Jun 23, 2014
The code posted in the spoiler is for a text file that I am saving text in. I get a 0x80004005 GDI Error on the line in the second code block. Data.BadgeData is a string[,].
Spoiler
-Its Where the code is at
public void SaveData()
{
string FileData = Data.FileLocation + @"BadgeData.Txt", Temp = string.Empty, FolderData = Data.FileLocation +@"ID" ;
[Code].....
View 14 Replies
View Related
Jul 14, 2013
I am working on a text-based RPG game and I want to allow the player to save his progress. So I need to save several integers and a string. And my problem starts here "How can I save integers and load them?". I read the tutorial but I dont understand. I need to write a function to save game?
View 8 Replies
View Related
Dec 4, 2014
I'm taking a programming class and currently we're doing data structures. Today, we discussed how to save square matrices column-wise with data structures. The teacher said that after the first few steps where you declare the structure, allocate the matrix, free it and get the dimension (which mostly make sense to me I think), you have to "get" and "set" the matrix by putting in something like
Code:
void setMatrixEntry(Matrix* A, int i, int j, double Aij) {
A->entries[i+j*A->m] = Aij;
}
[Code]....
View 7 Replies
View Related
Jul 18, 2014
I am receiving packets of data from an ethernet cable. This is the line of code that is streaming in data from the ethernet cable:
size_t num_rx_samps = rx_stream->recv(&buff.front(), buff.size(), md, 3.0, enable_size_map);[code]
Here are the segments of me trying to push the packets onto a vector:
[code]
std::vector<size_t> processing_queue; //HERE IS WHERE I'M TRYING TO PUSH THE PACKETS ONTO A VECTOR
processing_queue.push_back(num_rx_samps);
[code]
I previously had my program saving to a .dat file (the commented out lines), but I need to change it to pushing values onto a vector so I can stream the data packets from the ethernet cable to be processed. However, the packets aren't being pushed onto the stack as I suspected. What do I need to change to push the data packets onto a vector? The following is the code:
[code]
#include <uhd/types/tune_request.hpp>
#include <uhd/utils/thread_priority.hpp>
#include <uhd/utils/safe_main.hpp>
#include <uhd/usrp/multi_usrp.hpp>
#include <uhd/exception.hpp>
#include <boost/program_options.hpp>
[code]....
View 1 Replies
View Related
Mar 17, 2014
I want to connect an access database (.mdb) to my Windows Forms application - this I can do and I have no problems viewing my table in server explorer.
Some code example or template that I can use as a base to learn from - I have literally trawled Google and Youtube and cannot find what I am after.
What I want to do is have a basic form, 2 text boxes and a button to save the data to my database.
FirstName and LastName are the 2 boxes.
View 6 Replies
View Related
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?
View 2 Replies
View Related
Mar 27, 2014
I have a program I have to do that counts the number of words in a text file. I have tried the code on 2 computers now since my programming teacher told me the code was fine. Here is my code:
#include <iostream>
#include <string>
#include <fstream>
using namespace std;
int main() {
ifstream infile;
infile.open("tj.text" , ios::in);
[Code] .....
View 4 Replies
View Related
May 18, 2014
I would like to create program which will analyse bitmap so would need good concept to save data. I am interested about the theory and I realize that i must to think this carefully because bad concept could create insufficient memory or inefficient program. Basically I want my program work with HSV or HSL model so I would need to convert the bitmap to HSL, but I am not sure if I should convert it first and then analyse all pixels or should I start to analyse the bitmap and make the conversion to HSL during it. But my main question is what method to choose to save the data in memory.
Even that I would start with very small, it should work also with bigger image like image having 1200 or even 4200 px on height. So the program should first analyse all columns of pixels in the image so for example 1200x800 px image has 1200 columns. So I would like to know if is it possible to create such object which would have such structure like this
Obj->basicColumnData->black->columns[name]->group
and in the place of columns should be placed data for every column. I would look for groups of pixels in the column, so in the result the column x could bear e.g. 500 groups of information and every group should contain the range of pixels e.g. group 1 should contain y value from 0 to 20, group 2 should contain value from 25-27 and so on. So I would create 1200 columns bear many of groups. This would be contained in "black" or "white" member to contain the data. This is just simplified idea, but the whole object should contain next data not just basicColumnData... So there should be another members bearing information calculated from the selected data.
So my question is what kind of method of saving data use for this? Should I use heap and dynamic allocated memory or should I create custom class, which will define every member, but these members will have to be dynamic memory? With the dynamic memory is there problem that there could be not enough memory to create such big object?
View 5 Replies
View Related
Jun 1, 2013
I have an application with general customer detail.
It has TextBox and radio button.
First I have used if statement then code but on first step is working fine then error is showing.
try
{
if (textBox1.Text == "")
{
[Code].....
View 5 Replies
View Related
Feb 25, 2013
I wanna read data from txt file with space divided each value like
1.00518 2.01903 3.01139 4.01343 5.02751 5.99913 7.00011 7.99851 8.99506 9.98015 10.9901 11.992 12.9923 13.9932 14.996 16.0034 17.012 18.0255 19.0366 20.0485 21.0505 22.0664 23.0455 24.0383 25.0374 26.0439 27.0378 28.0376 29.0576 30.066
I know the size of the data is 2*500.
In matlab I can use like
fid = fopen('example.txt');
data = fscanf(fid,'%f,',1499500);
how should I write in C++?
View 3 Replies
View Related
Jan 14, 2013
I need to copy data from one text file to another.This is how data in file looks like:
2 -3 8 5 0
3 5 1
2 -2 3 1 7 6
5 -3 15 0 1
I succesfully managed to copy those numbers but with one mistake.The last number is written twice. My output file looks like this:
2 -3 8 5 0
3 5 1
2 -2 3 1 7 6
5 -3 15 0 1 1
This is my code:
int a;
string str;
stringstream line;
[Code]....
View 3 Replies
View Related
May 5, 2014
read some information from a text file. The program I'm working on is like a simple betting program.
What I need to read are:
match_code - team1 - team2 - odd1 - odd0 - odd2
139 Atletico Madrid - Real Madrid 2.853.40 2.35
But the spaces between datas are not known. We only know that both team names may contain more than one word and there is one space, exactly one dash and one more space (" – ") between team names.
Also match_code is an int and odds are double values.
while(getline(input, line)) {
istringstream ss(line);
ss >> match_code >> team1;
string temp;
while(ss >> temp) {
[Code] .....
In that missing part, I need to get the second word of team name if there is one; and the three odds that are odd1 odd0 and odd2.
View 2 Replies
View Related
Feb 10, 2015
Each line of the text file has first name, last name, and a salary. Something along the lines of this:
john doe 4000
bob miller 9000
I want my program to take the first name, last name, and salary of each line and assign them to strings. I have tried this so far:
while (inFile){
inFile >> firstName;
inFile >> lastName;
inFile >> grossPay;
cout << firstName << " " << lastName << " " << grossPay << endl;
}
When it outputs the names and the salary, the last line of the text file gets output twice by the program.
View 1 Replies
View Related
