C :: How To Read Characters From File
Dec 29, 2014
I'm new with C language. I got task to do . Actually there are 2 points. Both should be done with reading text from file. write down all letters from text in reverse alphabetic order (each letter 1 time).write down all words in random order.
I'm stuck with first point. Below code gives me entire text, but i need unique characters only. Text file contains few sentences.
Code:
#include<stdio.h>
void main( ) {
FILE *in;
int ch;
if ( (in = fopen("test.txt", "r") ) != NULL ) {
[Code] ....
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Nov 27, 2012
how to read UTF-8 characters from a xml file in c++, not using XMLCh type?
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Oct 12, 2014
How to read some characters from file, I know we can move a pointer to some position using seekg() & seekp() function, get current position of the pointer through tellg() & tellp() functions. By moving the pointer to appropriate position using seekg(), we can read the whole line using getline() function. But is there any function which read certain characters from the current position of the pointer and write certain characters from current position of the pointer.
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Oct 12, 2014
How to read some characters from file, I know we can move a pointer to some position using seekg() & seekp() function, get current position of the pointer through tellg() & tellp() functions. By moving the pointer to appropriate position using seekg(), we can read the whole line using getline() function. But is there any function which read certain characters from the current position of the pointer and write certain characters from current position of the pointer.
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Jan 31, 2014
I am writing a code to read a file and break it into lines and characters but I am getting an error do not know the reason for it though.
here is my code
#include<fstream>
#include<string>
#include<iostream>
[Code].....
The first line is executing properly but when it goes to the second line I get an error "the program has stopped working"
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Jan 27, 2014
I have written this program to copy all the characters input from the keyboard into the array till a "?" mark is entered. what is the error i am doing. I am getting a run time error in this case.
Code:
void word_reversal(void) {
char array[100];
int index=0;
printf("Enter the number of characters less than 100
");
do {
scanf("%c",&array[index++]);
}while(array[index] != '?');
}
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Mar 13, 2013
how to read characters from user and construct a sting and then extract part of it using substring?
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Oct 13, 2014
Write a program that reads a string of characters including punctuation and writes what was read but with the punctuation removed.
This is how i did it:
string x("#punctuation!?=");
cout << x << endl;
for(unsigned i = 0; i < x.size(); ++i) {
if(ispunct(x[i]))
x[i] = ' ';
cout << x << endl;
I am just not sure if thats how they want you to do it because it doesn't remove the punctuations it just replaces them with a space.
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Feb 12, 2014
I'm writing a program that reads and counts all the printable characters (ASCII 32-126)found in a text file.
For example if the text file read: Why so serious?
The output to the screen would display(in order of ascii value however):
Character-----Total
W--------------1
h--------------1
y--------------1
s--------------3
o--------------2
etc...
However, I don't think it's reading any of the characters.
#include <iostream>
#include <iomanip>
#include <fstream>
#include <cmath>
#include <string>
using namespace std;
int main() {
int i, count[127];
[Code] .....
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May 15, 2013
I want to read the contents of a file block (512 bytes) by block using low I/O read statements. Each record is 64 bytes long and has a pre-defined structure. The first 4 bytes are an unsigned integer; the next 20 bytes are ascii text, etc.
I have a buffer which I can access with buf[0] to buf[63] to read the first record and then buf[64] to buf[127] for the second, etc. However, I was wondering how to map a record so that I can refer to an integer as an integer and a float as float, etc. I can't create a struct and move the 64 bytes to it, as I will have alllignment/padding problems.
What is the standard way to deal with records in C?
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Mar 19, 2013
if i start reading individual characters from a text file having the following content: "music, Indian classical dance, and other aspects of Indian culture.It is also a movement with chapters in over 200 towns and" what are the characters that will be read after the word 'culture.' ?
will it be '
' , '
' , 'I' and so on
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May 20, 2014
I have some files for input that look like this:
Carlitos, Gauleses , Terra das Vagabundas, SN., 350, 12, 5.83
EMPIRE STATE, Gauleses , EMPIRE STATE, FÊNIX™, 298, 12, 7.00
bigorna, Gauleses , Aldeia d bigorna, DDT@D, 318, 12, 10.44
akemif, Romanos , Aldeia Akemif, DDT@D, 19, 12, 13.04
Black Mason, Gauleses , Kindorim, DDT@D, 424, 12, 15.03
[Code] ....
I get this data from a site and I copy paste them to create a .txt file for input (I do this my self, no program involved).
When the program runs it ends up like this on netbeans:
0 [main] program 2336 open_stackdumpfile: Dumping stack trace to program.exe.stackdump
When I type the input file my self it works fine. When I copy the data from the site that the problem occurs, it looks like those strange characters are causing the problem (notice the ????? are some drawings on text).
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Dec 6, 2013
I searched for a code to read characters from file and i found this one
#include <stdio.h>
#include <stdlib.h>
int main() {
char ch, file_name[25];
FILE *fp;
printf("Enter the name of file you wish to see
[Code] ....
but when i run it, and give the path of file in the cmd, this appears
stack around the variable 'file_name' was corrupted
given that i put the path in cmd as shown
D:CSEProject est1.txt
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Feb 22, 2015
I have recently hit a stump with C++ and have been getting pretty frustrated with this assignment. I just can't seem to find out how to start the assignment. Basically for the first part of the assignment, I need to find the number of characters in this .txt file my teacher provided for me. The only exception is that I can only count the actual letters themselves, not spaces or punctuation. How would I go about doing this? I have read about functions like isalpha but can't figure out on how to fit them into code to do the first part of this assignment.
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Dec 1, 2013
I think it comes from having to align the data in the output file. How to start this is to use a function to read in all the characters using a while loop. Then read in all the digits in a separate function. When it comes to outputting the data in the correct format I'm lost, so for now if I could figure out the functions that would be awesome. A final note we have not gotten to using strings so the I'm trying to use getc, fgetc, and ungetc.
Write a program to compute average grades for a course. The course records are in a single file and are organized according to the following format: Each line contains a students first name, then one space, then the students last name, then one space, then some number of quiz scores that, if they exist, are separated by one space. Each student will have zero to ten scores, and each score is an integer not greater than 100. Your program will read data from this file and write its output to a second file. The data in the output file will be the same as the data in the input file except that there will be one additional number at the end of each line: the average of the students ten quiz scores.
The output file must be formatted such that first and last names appear together in a left justified column that is 20 characters wide. Each quiz score should be listed in a right justified column that is 4 characters wide, and the average should appear in its own right justified column that is 10 characters wide.
Note that if a student has fewer than 10 scores, the average is still the sum of the quiz scores divided by 10; these students are assumed to have missed one or more of the quizzes. The output file should contain a line (or lines) at the beginning of the file providing appropriate column headings. Use formatting statements to make the layout clean and easy to read.
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Apr 17, 2014
I need to open a file that has multiple lines that look something like this, " black box 100.01 33.5 78.93". What this shows is the coordinates of the black box. Lines will have different objects with different coordinates. I need to create a loop that will read this file and tell me when a black box is found by displaying a message. I don't need to know how to create this file. I don't need to display the entire file but rather have it search for black boxes.
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Apr 3, 2014
I currently have a .csv file that should only contain numerical values however there are errors in some columns that mean there is text included. I am wondering what the best way of going about removing these characters would be.
I am looking at using : str.erase(std::remove(str.begin(), str.end(), 'xxxxxxx'), str.end());
For this I will need to read my data into a string and then remove the alphabet from that string. I am currently doing this like so (I use the '?' as a delimiter because I know there are none in my file).
#include <iostream>
#include <fstream>
#include <algorithm>
using namespace std;
string Weather_test;
char chars[] =
[Code] ....
The problem with this is I don't know what to do around the chars[!eof] part.
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Jan 19, 2015
I have the following program
#include "stdafx.h"
#include "string.h"
#include "ctype.h"
/*selection sort*/
void swap(int A[], int j, int k) {
int p = A[k];
[Code] ....
Theoretically it should cound the number of apperances of each character in a string, but:
1) It is counting characters from letter "j" upwards thus all asci characters below "j" are not counted, why is that?
2) I want also to make this code calculate the number of apperances of each character in a txt file. How to do that, i know i have to open a file in read mode, that's all (I am new to c programming)?
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Feb 28, 2012
I need to read Unicode characters from a file. The only thing I need to do from them is to extract their Unicode number.
For example if file has u I need to extract its corresponding Unicode number.
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May 9, 2013
The output should also give a file which doesnt consits alphanumeric. I tried this
while( ( ch = fgetc(fp) ) != EOF ){
if(isalpha(ch)||ch==' ')
Is this correct.than how to complete it.
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Mar 20, 2014
so my question is i want to print characters,no string just an array of characters,i do this but it s not working,maybe i have to put the '' at the end?
Code:
int main() {
int i;
char ch[5];
for(i = 0; i < 5; i++) {
scanf("%c",&ch[i]);
[Code]...
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Jul 6, 2014
Im supposed to find the common characters between two string characters, assuming that the user wont input duplicate letters like ddog. When I run my code I get an output of a question mark upside down. Here is my code with comments on what each part is supposed to do
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main(){
char str1[20], str2[20],remp = ' ';
int size1,i,j,temp;
printf ("Input the first string");
[Code]...
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Mar 21, 2013
I'm supposed to write a program to read a text file and display the following:
a) alphabetic letters //finished with
b) digits // finished with
c) other characters that are not alphabetic letters and not digits //finished with
d) total characters read
The bold part above confused me, by total characters, does it mean the alphabetic letters + other characters? how would I put that in my code?
Code:
#include <stdio.h>
int main (void)
{
int curCh;
int countCh = 0;
[Code]....
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Jul 21, 2014
I'm trying to copy a file into another file and copy the number of characters copied but my while loop doesn't even enter into a loop indicating the file is already at the EOF file character. I've confirmed this by placing the printf() statement inside the while loop, which doesn't print anything and by keeping it out of the while loop and changing the chars_copied to something like 9, it prints 9 for number of chars_copied. I don't understand why the file is already at the EOF character, I've tried this with a few more files, it's the same result.
Code:
#include <stdio.h>
int main(void){
FILE *input_file, *output_file;
int c, chars_copied=0;
if((input_file=fopen("C:workmarks.txt", "r"))==NULL)
perror("input file open failed");
[Code] ....
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Feb 20, 2015
I have a text file which contains many sentences. I am trying to extract only the numerical values from the string that conatins characters,numbers and white spaces from the file. I want to seperate the characters and numbers into different parts.
for example: the file contains sentances as given below.
I have to go to school for 10min.
You will come here in 15min.
He stayed here for 20min.
from the above sentances, I want to seperate " I have to go to school for " and "10" and put them into two different variables and also 10 should be in integer format.
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Feb 17, 2015
How does one read the number of characters in a .txt file excluding the spaces? Here is my code so far. I am getting 67, which is the correct number including spaces but can't find out how to exclude them. Here's my code!
#include <iostream>
#include <string>
#include <fstream>
using namespace std;
/////////------------------/////////
//Function Prototypes//
int fileLength();
[Code] .....
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