C :: Best Way To Copy Paste A String Between Two Files
Jun 4, 2013
I have one tab seperated file and i whish to change values in one column and then copy the entire row (including the changed value) into anothe file.
file :
Code:
x y z sdfsdgnsdfgndfjgndfbsgdf
x y z dkjfgdsbfvgsdfvg
x y z ksdnfsdfbsdnfsdvjsdbvjsdjfnsdbfubsdfjsdbfuibsdfsdfujbsduf
the way i am doing it right now:
Code:
while (fgets(line, sizeof line, list) != NULL){
result = sscanf(line, "%ld %ld %d %10000s", &one,& two, &three,string);
if (results == 4){
// change three
//print: one two three string
}
}
the problem is that the string in the file is of variable size and sometimes it is bigger then my char string[10001] array which then i need to resize and it gets messy. Is there a way to somehow , once identified first three numbers (and modified) just to read the rest on a character base and the print it character by character into a new file so that i can avoid string array completly.
Well if you don't know, there are multiple renderers in sdl, and on some don't work on certain computers, so people use a fallback ex: "accelerated renderer -> software renderer". Sadly, I haven't came across an example that I could copy and paste.
I have written a program that copies a file from the source and pastes it there (same location), but with a different name. The program works fine, except there is a small bug that i can't seem to fix. Here is the code:
/* This program copies a file from the current directory and pastes it to the same directory, but with a different name. The file name form the source must include the extension as well. */
> 1) Enter the name of the file you'd like to copy (Must be from the current directory) > A: 3.c // This depends if the file exists in the > current directory > > 2) Enter the name of the destination file (The file will be copied to the same directory) > A: 4 //The extension isn't necessary here > > Result: The file was copied successfully!
When I run the prg again, and this time input a file name with no extension, like this:
> Enter the name of the file you'd like to copy (Must be from the current directory) > 3 > You did not enter a valid text. Press "?" to get help or "x" to exit.
I hit "?" and it takes me to
> 1. The file must be from the current directory) > 2. The location mustn't be empty
Then it asks me
> Try again? (Y/N)
If i give N, it exits. BUT if I give Y, it goes, like this:
> Enter the name of the file you'd like to copy (Must be from the current directory) > You did not enter a valid text. Press "?" to get help or "x" to exit.
You see, it doesn't give me the option to give it the file name..
I have a WPF DataGrid with DataGridTemplateColumns, when I select rows and use Ctrl+C, and then in Excel or any document Ctrl+V, no data is pasted. If I change columns to DataGridTextColumn then copy and paste works fine. What can I do to make work copy & paste with DataGridTemplateColumn? Also when I set ClipboardContentBinding="{Binding FirstName}" for the template column, Null Refrence exception is thrown.
I'm working on a project that requires to make modifications to certain functions. So, I'll copy and paste the function to a new source code so I'm just working on the function with the entire program running. When I run the function by itself, it works fine. But when I copy and paste the function back to it's spot, the program doesn't wait for input at the cin.getline & it did wait when I ran just the function by itself. I'm using Dev C++ if that makes a difference.
I want to search a special folder (and SubFolders) for Sh files (*.sh) then copy them (if found) to specified directory in Dev-C++ ,so that i need two function:
1-Search in specified directory for special FileType (*.sh) 2-Copy given file to specified directory .
In linux/bash Scripting you can do this easily but i should do this in Dev-C++
I have a desktop application in which i want to copy files from my local computer to an online server. I have the user name and the password of the server. is there any way like
file.copy(sourcePath,destinationPath)
to copy the files where the destinationPath will be something like
I am trying to copy a string to an array of string. I have used these two examples before and they have worked so I don't understand why they won't work this time. I am getting a segmentation fault.
[URL]... [URL]...
I remembered to initialize everything.
char *strings_mneumonic_table[503] = {0}; char mneumonic[20] = {0}; int start_address = 0; int hash = 0; if(line[0] == 32)
[Code]...
Here is my output
hash is 2 little start BIG START 32 group mneumonic is START hash is 2 Segmentation fault (core dumped)
Copy some characters from char * arg to char * first using a loop with specific conditions.
Code:
char * arg; // set arg some string... char first_[25]; char * first; int length; length=strlen(arg); for (n++; arg[n] != '}' || n>=length-1; n++) strcpy(first,arg[n]); // first += arg[n]; I have strcpy(first,arg[n]); but arg[n] is char and strcpy expects char * ;
My goal is to copy only the elements of string 2 that are equal to string 1 into a new string. I tested this idea with an array of integers and it worked, but didn't work for the strings.
Code:
#include<stdio.h> main() { int scan1; char arr1[40] ; char arr2[40] ; char arr3[40] = {'_',.....,'_'}; /*for sake of brevity with post*/ }
#include<iostream> #include<string> using namespace std; int main(){ char char_array[10]; int ascii_array[10];
[Code] ....
I have been trying for a while to copy a string to an array, i know i can copy an char_array element to a string but its with a two dimension. How can i do this? i want it to be user entered.
I am getting an error when i try to open FILE which user must enter then program must open that file i an function and copy string from that file in other .
i'm right now using C, IO is done via ncurses, but that won't affect the following problem, i think. The relevant code is:
#define SIDEBARWIDTH 27 //... typedef struct {
[Code]...
surprisingly this works, now the new 3rd outputline is correct again. So it seems that the printcommand has some troubles with accessing the struct here. Not sure if that might be ncurses fault. Still feels odd.
I have this function in a class: and a private declaration: how can I copy the parameter "ProductName" to allowedProductName. I tried all combination and I can't get it to compile.
I have a VisualC++ program to display image data to the screen. The data is a 24-bit, RGB bitmap that is properly shown using BitBlt().
I have a CopyWindow() function that puts the BITMAPINFO structure and RGB image data on the clipboard as a DIB with the SetClipboardData(CF_DIB,...) call.
My problem happens when I try to paste the image into MS Powerpoint (Office 2010). I've tried Paste and all the options in Paste Special but the image will not appear.
If I open Paint and do a Paste, the image appears properly in that application. Then I can do a Copy from there and am able to Paste that into Powerpoint.
How is Paint able to accept the DIB? And what is different about how Paste puts that bitmap onto the Clipboard so that Powerpoint can see it?
I can't get c++ compilers to create or open files with a string input, even though the compiler accepts a file name in "quotes". How can I get this compiled (I am downloading a series of file names which I need to load into a consolidated file).
My coding (the commented line works, the string example does not).
//indirect file open example #include <iostream> #include <fstream> #include <string>
I am using the code below to write a single instance of object "Employee" to a file in Binary mode. The write part seems to work fine, however when I try to read the single employee object from the file into memory I get a double free or corruption error.
I think this has to do with the fact that I am using a string data member in the Employee class but I don't understand what is going wrong. I have read that strings can vary in length and use dynamic memory allocation but if I write a single employee object to a file with data member 'name' equal to "John", it should be the exact same size when I read it back in right?
The code below works with no issues when I omit the string data member. Why is that? Where is the memory for the string object being "double released" when I read the employee object back into memory from the file?
I am using Linux Mint 15, Eclipse June and GCC 4.7.3 with the -std=c++11 option.
Im trying to make a c++ program for a school project, and i need to store the information into binary files, but I'm having some problems trying to store a class with string members, for example:
class whatever{ protected: string name; public: (List of functions) }
But if I do that, my code just dont work when I write and read a binary file, but if I change the string to char array, for example:
class whatever{ protected: char name[20]; public: (List of functions) }
It works good, so I wanted to know if there's some way to store a class wiht strings in binary files, or what am I doing wrong?
I am having a slight issue with the strcmp function. I am comparing string data from two different files. I want the function to output a set of information if the strings are the same and a different set of data if the strings are different. My issue is, the function outputs the data that's the same but not different.
I had an else statement that compared the data if it was NOT equal but it only duplicated the data in the file.
One file is a listing of 100 books with 10 lines of information and an assigned market. The second file is a listing of the markets contained in the books file. However, the books file has a market that is not located in the markets file. The "missing" market is what is not priting or displaying.
I am writing a program to hide files behind other files using Alternate Data Streams in Windows NTFS file systems.
The program is as follows:
Code:
#include <stdio.h> #include <stdlib.h> int main(void){ char hostfile[75], hiddenfile[75], hiddenFileName[15] ; printf("Enter the name(with extension) and path of the file whose behind you want to hide another file: "); scanf("%75s", hostfile);
[Code]...
The complier is showing error as "Extra Perimeter in call to system" but I am not getting where?
I am writing a piece of code that requires me to display the last 1000 lines from a multiple text files (log files). FYI, I am running on Linux and using g++.
I have a log file from which - if it contains more than 1000 lines, I need to display the last 1000 lines. However, the log file could get rotated. So, in case where the current log file contains less than 1000 lines, I have to go to older log file and display the remaining. For e.g., if log got rotated and new log file contains 20 lines, I have to display the 980 lines from old log file + 20 from current log files.
What is the best way to do this? Even an outline algorithm will work.
void query::load_query(const char* filename){ string lines; int count = 0; ifstream file (filename); //READ OPERATION--ONE EXECUTION ONLY if(file.is_open()) {
[Code]...
the 'flds' on the code above has vector <string> data type, i was able to output it using cout but i don't know how to copy its value to another vector <string>...whenever i tried to do that using my own way, the compiled program ended up crashing...
