C/C++ :: Search In File And Extract Content Between 2 Strings
Jun 8, 2014
I need to develop a simple program, i have 2 variables (begin, end), and i need to search in a file, And extract the string between the Begin and the End variables to a new File, For Example:
my text file: file.txt:
some text here<StartHere>more text here</EndHere>text text
C++ Program:
//Declear 2 variables
strcpy_s(begin, string("<StartHere>").c_str());
strcpy_s(end, string("</EndHere>").c_str());
//And now, search in the Text file, And Extract the text between the begin string and the End string.
<...>
The Result should be: NewFile.txt with the content:
<StartHere>more text here</EndHere>
That's it!, Here is what i have for now:
#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
int main() {
int ocurrences_count = 0;
int ocurrences2_count = 0;
char word[20]; //this array will save user input
[Code] ....
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Jan 7, 2014
In a C++ map, is there any way to search for the key given a content? Example:
I have this map:
map<int,string> myMap;
myMap[0] = "foo";
Is there any way that I can find the corresponding int, given the value "foo"?
cout << myMap.some_function("foo") <<endl;
Output: 0
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Jul 9, 2014
I made my own function to search if two given strings in my function are equal but the problem is if i pass two variable like hello,hello ... result is string equal but if i pass hello , hello also give me string equal because last 4 characters same to last 4 characters of hello ...
Code:
int getSimilarityOfTwoStrings(const char str1[],const char str2[]){
int str1Len = getStringLength(str1);
int str2Len = getStringLength(str2);
int i = 0;
int j = 0;
bool truefalse;
[Code] .....
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Nov 22, 2013
How could I search a vector element with multiple strings
i.e. vector.at(i) = This is a test
How could I search that to look for the word "test" in that element?
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Feb 4, 2013
The function should search the array of strings to find how many times the word 'the' was used. but its only returning a 0.
int FindThe (int The, char Paragraph[], char Pattern[]) {
for (int i(0); i < 500; i++) {
if (Paragraph[i] == Pattern[0] {
[Code] ....
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Sep 25, 2012
I'm trying to do a binary search on a vector of strings and keep getting this error. This is the PhoneEntry header file with the class declaration:
Code:
using namespace std;
#include<string>
#include<iostream>
#include<fstream>
#include<vector>
#include"phoneNumber.h"
[Code] .....
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Mar 15, 2013
The Objective Of This Program Is To Create A File To Write Text And Read Back The File Content. To Do That I Have Made Two Function writeFile() To Write And readFile() To Read.The readFile() function works just fine but writeFile() doesn't.
How writeFile() function Works? when writeFile() function Execute It Takes Characters User Type And When Hit Enter(ASC|| 10) It Ask "More?(Y/N)" That Means What User Want? Want To Go Next Line Or End Input?
If "Y" Than Inputs Are Taken From Next Line Else Input Ends.
But The Problem Is When Program Encounters ch==10 It Shows "More?(Y/N)" And Takes Input In cmd variable.If cmd=='Y' I Mean More From Next Line Than It Should Execute Scanf Again To Take ch I Mean User Input.But Its Not!!! Its Always Showing "More?(Y/N)" Again And Again Like A Loop.
Code:
#include <stdio.h>
void writeFile(void);
void readFile(void);
int main(){
[Code].....
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Jan 13, 2015
I managed to read txt files and printing them on the console window. I was given a task to select and sample a certain amount of data.
Example of txt file:
Voltage (V),Current (I),Power (W)
50,2,100,
51,2,102,
52,2,104,
etc.. How can I display only the column of Voltage and Power?
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May 21, 2014
I need to extract comments from a C file, which are usually marked with " /* This is a comment */ ". It seems to me that I need to calculate first at what position is the / and then ask it if on the very next position to the / operand is the *, if it is then I need check where is the next * and if / operand is immediately next to it. At last I need to take everything between values that the first and second * have. But I don't know how to write that in code.
This was supposed to be done in c++.
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Aug 10, 2012
I have a list of files stored in a .txt file
$codeguruc++display.txt$15$
Directory File Folder: codeguruc++
File Name: display.txt
File Size: 15kbs
$ is an delimiter
I want to extract the name and the extension from txt files.
Code:
#include <iostream>
#include <fstream>
#include <cstdlib>
struct MyFile {
std::string Directory;
std::string Filename;
unsigned filesize;
[code].....
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Mar 28, 2013
Can i edit records stored in file without rewriting whole file again .?
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Apr 9, 2013
how to extract certain cells for an excel file that is continuously updating. I had a look at [URL] since they provide a .h library that is useful for this situation, but could not find any code.
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Feb 20, 2014
I am trying to iterate through a file path to extract the file name. since the . separating the name from the extension is a unique character, i thought i would reverse iterate from the . to the first separating directories. however, when trying to reference the memory location of the position of the . in the string, i am getting an i-value error:
for (std::string::reverse_iterator iter = &(songPath.find('.')); iter != songPath.rend(); ++iter) {
if (*iter == '')
break;
else
songName.push_back(*iter);
}
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Apr 3, 2013
I am using c to read and write contents of a file into other:
FILE *ptr;
status_t status;
uint32_t block_size, result;
uint32_t num_blocks;
char temp_buffer[1024];
}
[code]....
Is there way to see the binary content of this file.
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Mar 3, 2014
When we are using RAM DISK - the files are stored on the RAM. From what I understand (and saw many examples) in order to read data from file (the file which locate on the RAM) - I need to use the read function.
Is there a chance to get char* (or any pointer) to the content of the file without using the read function ?
If the file locate on the RAM, it seem that it is like I have a buffer on the RAM (like an array which was dynamic allocated) and in the case of a buffer on the ram -> we can use pointers to the data without reading all the data.
example:
class CDATA {
int nValue1;
int nValue2;
double dValue3;
double dValue4;
char achBuf[10];
[Code] .....
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Mar 14, 2013
How to write a C or C++ program that extracts certain numbers out of a section after the 4, 5 and 6 space.
For Example:
The output file will produce:
[ [1900 00 0 -2.000000 0.650000 0.006000 0.020000 2.274000 0.010000 54 0 0.7 10.8 1 0 0 0.000000 17.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 18];...
So I want to extract the numbers 0.650000, 0.006000, 0.020000 because those are the 4,5,6 space after [ [
Another problem I have is that the output file I showed will always being updated constantly for instance as follow:
[ [1900 00 0 -2.000000 0.650000 0.006000 0.020000 2.2054000 0.010000 10 0 0.7 10.8 1 0 0 0.000000 17.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 13];...
[ [1900 00 0 -1.000000 0.650000 0.006000 0.020000 2.694000 0.010000 9 0 0.7 10.8 1 0 0 0.000000 17.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 10];...
[ [1900 00 0 -2.000000 0.6023000 0.04000 0.050000 2.2454000 0.010000 5 0 0.7 10.8 1 0 0 0.000000 17.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 12];...
And it will keep updating like this and I want to update the previous numbers I extracted with now the new numbers after the 4,5, and 6 space.
So I have to write a code to let it know when it encounters [ [ start looking for the 4,5,6 space and get those numbers and once it reaches ;... that's the end of that section so re-look for the next section of numbers after the 4,5,6 space.
The file will be a text file or matlab file that is always being updated with these sections of numbers. Can I make this a #include<nameoffile.h> or does .h not work with a file that is always being updated.
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Mar 10, 2013
I need to write a C++ program, that extracts certain variables, x y z, from a file that is continuously being updated x y z. These variables are going to be used to recalculate a new answer.
My question is to see if it is possible to have an include .h file that is always being updated so that I can extract these three variables from it, and always have the newest venison of each variable, so that the answer to the equation is always the newest updated. Should I use fopen or fwrite to do this.
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Sep 18, 2013
A user enters a query and other users reply to it. But it creates a problem here. After adding queries, if I wish to reply to query in between then it adds a redundant entry in file. 1st entry is the original query without reply and 2nd entry is the same query now with a reply added. I want only 1 entry of the query along with replies.Here is the code:
Code:
#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
#include "var.c"
int check_count();
void add_query();
void add_reply();
}
[code]....
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Sep 24, 2013
I'm trying to read all content from a text file into a string. This is the code I'm using for it (I know there are other, maybe better ways to do it but I'd like to stick to this for now):
char* buffer;
std::string data;
FILE* fp = fopen("textfile.txt", "rb");
if (!fp) {
printf("Can't open file");
[Code] ....
So my problem is that I get an exception when I try to free the memory -> 0xC0000005: Access violation reading location 0x51366199
I even get the exception when I try to free it immediately after calloc() but why this is.
And if I use buffer = (char*)malloc(lSize); I don't get any exceptions.
So, why this fails and what I'm doing wrong.
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Jan 28, 2013
I would like to store the entire content of a file in a single c-string variable or in a standard string class variable. Is there a function that will do this for me? I am familiar with functions that get one character or one line at a time but I don't think I've encountered a function that gets the entire file. Does this function keep or disregard the end-of-line character? If no such function exists, I would write my own function to create and return such a variable.
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Feb 8, 2014
I am trying to write a program for a library system that allow stuff to add, remove, view and delete customer. i try to use file to store data and i open the file in mode read then i store then i put the content of the file into a structure. now the problem started it is only showing me haft of the content and here is the coding.
#include <stdio.h>
# include <windows.h>
# include <stdlib.h>
#include<string.h>
#include<conio.h>
void search(int s,struct books eli[20]);
void view(int x,struct books eli[20]);
[Code] .....
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Oct 31, 2014
How do I output a Unicode number if I extract a character off a console or out of a file.
If I do the below, I use the Unicode number to show a character. The below shows me 25² .
char b = 'u00B2';
mystring = "25";
mystring.append(1,b);
How do you go back the other way? If I extract the 25 and the ² separately, how do I get the unicode number for ² ?
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Dec 10, 2013
I need a large string vector for file content manipulation.
v1.max_size() gives me 153 391 689.
But if I make a test by looping a vector pushing back strings it crashes around 16 - 26 000 000 though I still have a lot of ram (1GB left).
How come and why isn't vector size limited by ram instead?
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Nov 29, 2014
Code software that, from an original text file, generate another file with the text content in upper case.For exemple:
entrence:
luke
tom
alex
outings:
LUKE
TOM
ALEX
My code so far:
Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
}
[code]....
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Jun 25, 2014
Basically I have a text file called words. I'm supposed to extract a word randomly form the file and have the user guess the word. If they guess the word correctly in x number of tries they will receive the definition.
I'm having trouble receiving that random word and I'm getting the definitions from the file.
Here's my code:
#include <iostream>
#include <fstream>
#include <string>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
using namespace std;
[Code] ....
This is what is in the words.txt file
apple#the usually round, red or yellow, edible fruit of a small tree
boat#a vessel for transport by water
horse#a solid-hoofed plant-eating domesticated mammal with a flowing mane and tail, used for riding
television#a system for transmitting visual images and sound that are reproduced on screens
soup#a liquid dish, typically made by boiling meat, fish, or vegetables, etc.
bottle#a container, typically made of glass or plastic and with a narrow neck
barber#a person who cuts hair
toast#sliced bread browned on both sides by exposure to radiant heat
radar#a system for detecting the presence, direction, distance, and speed of aircraft, ships, and other objects
red#of a color at the end of the spectrum next to orange and opposite violet
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May 31, 2013
I am trying to get text file and read only first 100 lines of the text content using c/c++. how can i do it?
is it something like string line;
getline(stream,line);
??
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