I've created a text file with the numbers from 1-450. After writing code to retrieve and print out the contents in the text file, the compiler only printed out the numbers 124-450. Is there a reason why this is happening?
View 19 RepliesI have written the following code but i am stuck. Write a program that will prompt the user for a file name and open that file for reading. Print out all the information in the file, numbering each new line of text.
Code:
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <ctype.h>
int main()
{
char line[81], filename[21], c;
int i = 1;
FILE *inFile;
[code]....
Code:
#include <stdio.h>
#include <stdlib.h>
int main (int argc, char *argv[])
{
char buffer[256];
FILE * myfile;
myfile = fopen("read.txt","r");
[Code]...
I also got an error in printing wherein the data in read.txt is "Hello" newline "World" and my program prints world twice.
Suppose I have a txt file that I want the contents printed to the console in such a way that every five words are colored blue and the following five are red. How do I accomplish such a task? I am currently only able to print the contents of the file in regular color using ifstream.
View 1 Replies View RelatedI am trying to open a file and print the contents of the file to the terminal window. It works when I put the file right in the directory with the Solution but not if the file is out on my desktop and I use the full path. Here is the code:
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int OpenFile(){
fstream SampleFile;
[Code] .....
I'm making a program in which it will read an input from a text file and then count the numbers of spaces , characters , words . Here is what i think it would work : First i will transfer the contents from the input.txt into a string , after that i will create 3 strings which contain each of these : spaces , characters , words . Then comparing each of the contents of the intput.txt_string to the other 3 strings .
#include<iostream>
#include<fstream>
#include<string.h>
using namespace std;
[code]....
and of course it doesnt seem to work...
So I am working on a FUSE filesystem and I currently have the need to load the contents of a text file into an array.
My array initialization looks like: char array[max_entries][PATH_MAX] = {NULL}
The reason I want to pass it by reference is that I want my function to return two values essentially. One a specific char* and the other an array like I initialized. My function proto type looks like:
char* load_meta(char* list[max_entries][PATH_MAX], char* path, int mode);
How I'm trying to call the function:
someChar = load_meta(&array, path_name, 1);
Within the function I try to edit the array by deferenceing it once, like this:
strcpy(*list[i], file_entry); // This seg faults
I want the user to enter the word and I want to check if it exists in a text file or not. I tried
int flag=0;
char word[50], input[50];
cout<<"Enter word to search for";
gets(input);
[Code] ....
But it does not seem to be working. Should I make changes to it or is there another way?
read a text file and store the file contents into a 2D array?
100 101 102 103 104 105
106 107 108 109 110 111
112 113 114 115 116 117
118 119 120 121 122 123
124 125 126 127 128 131
Here's my code:
const int ROWS = 5;
const int COLS = 6;
int array[ROWS][COLS];
ifstream inputFile;
inputFile.open("table.txt");
[code]....
When i run the program and try and display the array, it doesn't work.
I am trying to store the contents of a text file into a char array. However the function i am using ifstream member function get(); seems to stop working when fed with certain characters. Is there another solution besides the get() function that will accept all types of characters from files?
char text[1000];
for (int i = 0; i <= textlen; ++i)
{
text[i] = text_in.get();
}
C program to count the number of lines in a text file and reverse the contents in the file to write in an output file.
ex :
input
one
two
three
output:
three
two
one
I wrote a program to write text contents to file stream through fputs, the file stream address was changed in the middle of writing text content to the stream (11% text content have been put into the file stream), that cause the file stream pointer can be evaluated problem and raise exception on stream validation code in fputs library function, my question is what things could go wrong to make file stream pointer changed its address to something else or a NULL pointer if the file stream have not been flushed and closed.
View 5 Replies View RelatedI am trying to print the content of the CRichEditCtrl v 2.0. The problem is that when I want to use pagination (with A4 pages), the printed text (which is just 4 sample line with 40 chars at most) at the code lTextPrinted =FormatRange(&fr,TRUE); is always lesser than the actual text pointed by the lTextLength variable making the loop run for ever. notice that using the RichEditControl Version 1 it works fine.
Check the code. I am attaching also the full source code at [URL]
Code:
CPrintDialog printDialog(false);
if (bShowPrintDialog) {
int r = printDialog.DoModal();
if (r == IDCANCEL)
return; // User pressed cancel, don't print.
[code]....
In this program I can not print the typed value in the file. The file creation well done but it is an empty file
I press Ctrl +z for EOF
Code:
#include<stdio.h>
int main(void){
FILE *fp;
char ch;
fp=fopen(" Test.txt","w");
printf(" Enter the TEXT
[Code] .....
I am having a problem using fprintf. I have a function which flips a coin. Heads prints a text to the screen. Tails prints a different text to the screen. My problem is getting the result to print to a text file.
Code:
#include <stdio.h>
#include <stdlib.h>
#include<time.h>
void seedrnd(void);
int coinflip(int small, int large);
}
[code]....
I need to create an overloaded cout that will print the contents of an array. So I can say output << a << endl;
And it will print the contents of the object a... which happens to be an array.
class info:
class List {
public:
List();
bool empty(); //returns true of false if empty
void front(); //makes current position at beginning of list
void end(); //makes current position at the end of list
[Code] ....
I understand this code, I am simply calling the size method from the program, but i don't know how to pass in the array so that i can print it line by line... simple syntax i am sure... but the whole thing is baffling me... I need to be able to call this on any variation of the class, so it cannot be specific to any one array.
I am having trouble in reading data from my text file and print it out exactly like how it looks like in the text file. The problem im having is it will not read the last y Coordinates of the point. it keep reading the second last point for y coordinates which is wrong.
my text file is
0.0 0.0
0.0 1.0
1.0 0.0(but it read until here)
0.0 0.0(suppose to read the last point which is here)
For your information, this is my 1st year degree assignment in C programming. It is to create a program which can read text file (manually create) and print it out in a program and calculate the area for the polygon using ADT function ( .c and .h files)
*This is the code for my read file function*
Basically this accepts a Polygon and a file pointer as parameters. It reads the polygon point data from the file, pass the read data to plg_new() to create a new Polygon and returns the new Polygon created.
Code:
polygon *plg_read(polygon *New_polygon, FILE *Coord) {
int i;
int numberofvertices=0;
int count=0;
char filename[50];
double xCoor[50], yCoor[50];
[Code]....
This is the second function my polygon new code. This ADT function basically creates a new Polygon with malloc(), initialize all ADT data members with its parameter values and returns the Polygon.
Code:
polygon *plg_new(double *xCoordinates, double *yCoordinates, int numberOfVertices) {
int x;
polygon *New_poly = (polygon *)malloc(sizeof (polygon));
if(New_poly->xCoordinates == NULL || New_poly->yCoordinates == NULL) {
free(New_poly);
[Code]....
This is the rest of the code if you need to refer to other codings.
Code:
/**
*@file polygon.c
*@brief Functions for polygon / Struct has polygon numberOfVertices, polygon *xCoordinates and polygon *yCoordinates
*@author: Tan Xian Yao
*@id: 4323440
*@date: 22/04/2014
*/
[Code]...
I am trying to create a random 3x3 matrix and print it out in a text file using basic functions. My code below will not compile.
#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;
//nxn Matrix = 3x3
const int ROWS = 3;
const int COLS = 3;
[Code] .....
I am in an "intro" C++ course and am having trouble with a section of my current project.
We are required to open a text file, read the data from that file, and print it back.
However, we are supposed to let the user input the name of the file that is to be opened. This is the code I have so far. It is not opening anything.
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
const int NUM_QUESTIONS = 30;
typedef char CharArray[NUM_QUESTIONS];
string fileName;
[Code]...
I have a text file where in each line is 3 words and 2 int type numbers. I'm doing search by word and I want to print out to the screen the whole line where that word was found (the words is repeated in some lines). My search looks like this:
Code:
#include<iostream>
#include<string>
#include<fstream>
#include<stdlib.h>
#include <vector>
using namespace std;
int main(){
vector <string> words;
string str, paieska;
[Code] .....
How to print line(s) where I found that word?
I have to create a small data base for a shop. One of the functions i am creating is taking a customers ID and scanning that through a text file and to print out the info about that customer. What i am having trouble with is where do i insert the string compare in my program?
//declaring array for input of customer ID
int customer_ID [20];
printf("Please enter the customer ID:");
gets( customer_ID ); //users input stored in the array
[Code] .....
I created a simple program that writes some text to two different text files. how to create a program that would retrieve the information from those two files, and put them in a single file, first the content of input1 and then the content of input2. how to do this. Here is the program that I created that creates the two files.
#include <iostream>
#include <fstream>
#include <string>
int main() {
using namespace std;
string input1;
ofstream fout("input1.txt");
[Code]...
I am using the OpenCV library (2.3.1-7) and Qt-Creator (2.4.1) and I have this simplified piece of code that reads in an image as cv::Mat and then applies the OpenCV function pyrDown to the cv::Mat.
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/gpu/gpu.hpp"
using namespace std;
using namespace cv;
int main()
[code]....
This piece of code runs just fine and puts out the two different images as exected.
What I need to do now is to retrieve the source code of the "pyrDown"-function and then modify it according to the needs of the project that I am working on.
If I comment out the following line
//#include "opencv2/gpu/gpu.hpp"
then this results in the following error message:
'pyrDown' was not declared in this scope.
Apparently, pyrDown only works if #include "opencv2/gpu/gpu.hpp" is included in my code. Therefore the header of pyrDown should be included in this file, correct?
I am using Qt-Creator and the tooltip text for "pyrDown" is as follows:
"void pyrDown(InputArray src, OutputArray dst, const Size &dstsize=Size())"
Therefore, when i checked the file "/usr/include/opencv2/gpu/gpu.hpp" (which is the complete path to the file), looking for the headers of "pyrDown" I expected to find a matching header.
But instead, I only found this:
//! smoothes the source image and downsamples it
CV_EXPORTS void pyrDown(const GpuMat& src, GpuMat& dst, Stream& stream = Stream::Null());
struct CV_EXPORTS PyrDownBuf;
CV_EXPORTS void pyrDown(const GpuMat& src, GpuMat& dst, PyrDownBuf& buf, Stream& stream = Stream::Null());
[code]....
Those are all the lines of code where the character string "pyrDown" is included.To me, being rather a newbie, it is kind of strange that there is no header that matches the call of the function as it was included in my simplified code example at the very top of this post.
What I would like to understand is the following:
1) Is the file gpu.hpp really the one that stores the header that is used for the call in my code example? If so, I would like to understand why this is the case, since the data types of the parameters seem not to match (eg "GpuMat&" vs. "InputArray"). In gpu.hpp there are other files included, using the "#include"-command, but a text search in those files did not find any strings like "pyrDown" in any of them.
2) If gpu.hpp is not the header file that I am looking for, which one is the correct one and where can I find it?
3) The most important part for me is: Where can I retrieve the corresponding .cpp file for pyrDown, since this is crucial to the progress in my project. I have googled a lot and I found lots of .cpp files that were named "pyrDown.cpp" (example: [URL]), but none of them seems to be the one that I am looking for since either the data types in the header are not in accordance with what I expect or there are #include commands for files that I do not have available on my machine. And I assume that any .cpp-file that tries to use files that are not on my computer can not be the one that is used for the call in the code example at the top of this post.
I'm writing a program that stores records into a file and then these records can be printed out. A last name, first name, and score is stored to be exactly 36 characters long (using leading spaces to pad) making it easier to retrieve specific records. For example, three records stored in the file would like like this: (the underscores are simply to illustrate the distance, they are not in the file itself)
_______lastname_______firstname__90__________lname __________fname_100___________last___________first __60
When printed out, the names are formatted as follows:
lastname, firstname: 90
lname, fname: 100
last, first: 60
However, when I print them out this is what I get:
lastname, firstname: 90
lname, fname: 100$
last, first: 60H
For some reason, for any record after the first, an extra character is added to the end. These characters are not in the file, so I was thinking that the array for some reason wasn't being filled completely, (the array is initialized to size 36 and 36 characters are read from the file using fread) so it was printing out a random character assigned to the 36th array position. Except the character never changes, (always a $ for record 2, H for record 3, l for record 4 if i remember) and I've tried reducing the array size or the number of character read and it's the string that gets altered, the random character always remains. I figure the problem must be in the print_records function (appending seems to work no problem). Anyway here is my print records and appending records code.
Code: /*
- Prints a single record stored in the file pointed to by ifp.
*/
void print_record(FILE *ifp, int record) {
[Code]......
Right now I'm working on an assignment where I need to take the data from on file encrypt it by adding 5 to each byte and then save it to a user specified location. I think I'm close to having it done but I've run into a hick up. After I get the user input for where the encrypted data should be saved the program seems to never end. This is the code I have so far
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main()
{
ifstream input;
ofstream output;
[Code]...
How can I read contents of a file from the last character? Can I use a loop?
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