C :: Using Strtok In Conjunction With Fgets Function To Parse File Data

Feb 17, 2013

In the assignment we are forbidden to use fscanf(). I have been trying to get this to work, but I've started to realize that I do not have a complete understanding of what strtok() actually does. I'm getting this warning when debugging: "assignment makes integer from pointer without cast."

This warning happens when assigning str to goal and assist, and I think it is because they are, when dereferenced, integers. The code below correctly assigns the name into the correct spot, but leaves nonsense data in the goal and assist arrays.

ex:-7880, -7888 file example: NAME GOALS ASSISTS JOHN 1 2

Code:
void readLinesFromFile( FILE* Ptr, int* goal, int* assist, char** name, int lines ){/*
* Reads lines from files and populates the arrays with the corresponding info.
*/
int index;
char hold[ MAX_LINE ] = { 0 };
char* str = NULL;

[Code] .....

From what I understand about strtok(), it returns a string, and takes in a character array and a key value that tells it when to stop. In the online examples I've seen, they use NULL in the first field. I'm not sure why.

View 5 Replies


ADVERTISEMENT

C/C++ :: Parse Telephone Data File?

Oct 18, 2014

Write a program that reads the telephone.dat file and displays its contents on the console. The program should allow the user to add new entries to the file.

I have saved the file into a resource file within visual studio and I am trying to run the code to where the file will be shown when I run the program. I know that the program is running and the file is there because if i misspell the filename it will give me the error message. I don't know how to make the contents of the file display.

#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main() {
string input;
fstream dataFile;

[code]...

View 14 Replies View Related

C :: Reading A File In And Separating Line With Strtok Function

May 2, 2013

I'm trying to read a file from the 2nd argument, skipping the first line of the file since it's the name of the columns, and separate each line as a token, by date, subject, startTime, endTime, and location.Here's my code that I got so far:

Code:

void readAppointment(){
if (arg != 2)
exit;
else {
FILE *fp;
fp = fopen( argv[1], "r");
char line[999];

[code]....

View 1 Replies View Related

C :: Play MP3 File And Delay / Fgets In One Function

Jul 2, 2014

How can i play a mp3 file in the background?How can i rule the volume of the mp3 file?why does delay(0.25) doesnt work in this code?

Code:

FILE *datei;
char line[ANZAHL][LAENGE];
int i ;
datei = fopen ("song.txt", "r");
if (datei != NULL){
for(i = 0; i < ANZAHL;i++) {
delay(0.25);

fgets(line,LAENGE,datei);
printf ("%s

[code]....

View 2 Replies View Related

C :: Using Fgets() To Scan A Data Before A Delimiter

Dec 21, 2014

Is it possible to fgets() the string (or word) only after a delimiter? I yes then how?

Example: Code: printer, scanner, machine

Also, how can I sscanf() a string with an indefinite number of sizes and assign it to only one variable?

Example:

Code:
str = "I Love C programming 9000";
sscanf(str, "%s %d", strvar, intvar);

View 13 Replies View Related

C/C++ :: How To Parse CSV Data With TinyXML 2

Mar 22, 2014

I am using TinyXML 2 for the data of my RPG game, I am almost done with the tilemap parsing system, but I just couldn't figure out how to extract csv data that I have in my XML file, like this:

<data encoding="csv">
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,9,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,

[code]....

What I want to do is to extract this data using TinyXML 2 and to put the data into a 2D vector...how can I do that?

View 9 Replies View Related

C/C++ :: Palindrome Program - Cstrings Using Strtok Function

Feb 28, 2014

I had an assignment to do a palindrome program but im stuck in this part.

"This c-string will be sent to a function that will remove all spaces and punctuation marks from its c-string as well as change any uppercase letters to lowercase. Use string tokens to eliminate the spaces & punctuation marks. Make sure you include the NULL as you concatenate the tokens into a c-string. Then copy back into the original c-string for the pass by reference."

void tokenptr(char drome[]) {
char *token;
size_t i;
token = strtok(drome, " ,.!:;?");
while (token != '') {

[Code] .....

I'm pretty sure I did that part except how can i pass this cstring back to main? We really haven't even touched much of pointers except to use strtok().

View 2 Replies View Related

C :: Using Strtok And Strcpy In File

Sep 27, 2014

How to use strtok and strcpy in a file?

View 1 Replies View Related

C :: File I/O And Strtok Not Advancing

Nov 20, 2013

I wrote this program, it's supposed to take a user-specified file, which has a bunch of numbers, and add all the numbers in a line and give me a sum and average.

Sample file:
------------------------------------
2 1 2
3 1 2 3
4 1 2 3 4
------------------------------------

This would output:
------------------------------------
Group Size = 2
i = 1 number = 1 Sum = 1
i = 2 number = 2 Sum = 3
Average = 1.50

Group Size = 3
i = 1 number = 1 Sum = 1
i = 2 number = 2 Sum = 3
i = 3 number = 3 Sum = 6
Average = 2.00

Group Size = 4
i = 1 number = 1 Sum = 1
i = 2 number = 2 Sum = 3
i = 3 number = 3 Sum = 6
i = 4 number = 4 Sum = 10
Average = 2.50------------------------------------
// END CONTEXT

Anyway, I wrote this program. Here it is. But strtok doesn't want to advance to teh next token?

Code:

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int main(void){
int a, sum, number, groupsize;
}

[code].....

View 4 Replies View Related

C :: Parse Data Coming From Razor AHRS Accelerometer?

Oct 4, 2013

I am working on a quadcoppter and am having trouble trying to parse the output that I am getting from the sensor. This is the code that I am trying to get to work but the Arduino compiler is saying that i can't convert and int to a string unfortunatley I am trying to get the string to convert to an int.

Code:

//string that will be processed is this
//Ax=-209 Ay=5 Az=1116 | Gx=7 Gy=0 Gz=7 | -31 233 -433 Headings 100.20
void setup() {

[Code].....

View 5 Replies View Related

C++ :: Using Fgets To Read In A String - No Conversion Function Error

May 27, 2013

I am trying to use fgets to read in a string, but keep getting a "no conversion function from std::string to char" error.

View 2 Replies View Related

C++ :: Evaluate Truth Value Of Conjunction / Disjunction And Implication Of Each Value Row

Jan 25, 2014

The program must evaluate the truth value of the conjunction, disjunction, and implication of each value row. For each logical operator, P is the argument to the left of the operator and Q is to the right.

For conjunction: P ^ Q, disjunction: P _ Q, and implication: P ! Q.

Example prog2 input.txt
P Q
T T
T F
F F

For each value row the program must output a corresponding row, in the following format:

P and Q:<T or F> ntP or Q:<T or F> ntP --> Q:<T or F> For the example input given above

the output is found below.

Example prog2 output.txt
P and Q : T P or Q : T P --> Q : T
P and Q : F P or Q : T P --> Q : F
P and Q : F P or Q : F P --> Q : T
.
This is what I did so far

# include<iostream>
#include<fstream>
using namespace std;
bool charTobool (char c) {
switch (c)

[Code] ....

View 1 Replies View Related

C++ :: How To Parse EML File

Aug 28, 2014

I am doing a project processing emails in EML format. I searched for a library doing eml file parsing and got no hits. I really dont want to code the parser myself. I just want to get the project done with minimize cost. Which library should I use?

View 4 Replies View Related

Visual C++ :: System Function Fails To Parse Argument

Apr 29, 2014

I have a very strange problem with the system() function (on XP).

I have the following code:

Code:
char *text1 = ""A SpaceAction.bat" fred";
char *text2 = ""A SpaceAction.bat" "fred"";
int main(int argc, char *argv[]) {
printf("%s
", text1);

[Code] .....

When I run it where "A Space" is a directory with a space in the name, this is the result:

Code:
"A SpaceAction.bat" fred

F:Test>echo Testing
Testing
"A SpaceAction.bat" "fred"

'A' is not recognized as an internal or external command, operable program or batch file.

It seems that the double quotes round an argument make the parsing of the command fail.

View 1 Replies View Related

C++ :: Parse Value From Text File?

May 16, 2014

Suppose i have a text file with ":" as delimiter, how to i find the average value of each column? For e.g. First column will be (3+2+5)/3 and second column will be (61+87)/2 for the third column.

Sample text file
================
3:290:61:100:
2:50:
5:346:87:

I have tried using getline in while loop, but it seemed more complicated because i think it requires much more than that.

View 2 Replies View Related

C++ :: Parse A Text File That Contains Information

Jul 31, 2014

I am trying to parse a text file that contains information and i cant seem to get started. For example, the text file looks like this:

idx=929392, pl= 12, name= someperson
age=19
state=ma
status=n/a

idx=929393, pl= 12, name= someperson2
age=20
state=ma
status=n/a

idx=929394, pl= 12, name= someperson3
age=21
state=ma
status=n/a

I want to parse the name and age into another text file like this format:

someperson 19
someperson 20
someperson 21

possibly include other attributes next to the age like idx?

View 3 Replies View Related

C++ :: Parse And Edit A Text File?

Nov 14, 2014

I have this project for school where I basically need to write a program that will take any text file and convert it into html code.

string line;
int lineCount = 0;
while (!inFile.eof()) {
getline(inFile, line);
cout << line << endl;
lineCount++;
}
cout << lineCount - 1 << " lines of text read in this file." << endl;

I have this block of code to print each line of the text file into the terminal window and count the number of lines printed. But I don't know how to make it change a single character or set of characters to something else. For example, if a line of text begins with the number "1", I want to be able to change it to "<h1>".

View 2 Replies View Related

C++ :: Using Getline To Parse From A Text File?

Nov 23, 2014

I'm trying to make a program where it reads a text file which contains "blocks" of questions like:

Type: multiple_choice
Question
Num_options: number of options
a) option1
b) option2
c) option3
d) option4
Letter of answer

and

Type: short_answer
Question
Answer text

what I'm trying to do is use parse those blocks and have it get handled by the classes, MultipleChoice and ShortAnswer.

I'm planning on using getline as a virtual function and have an if statement like
"if (string == "multiple choice)
** then get it handled by the MultipleChoice class "

View 10 Replies View Related

C/C++ :: How To Parse CSV Formatted Text File

Aug 9, 2012

my data are
#saben~123~tvm~999999~local~#
#ach~123~tvm~999999~body~#
#sam~123~tvm~999999~wash~#
#sus~123~tvm~999999~area~#
#sach~123~tvm~999999~local~#

View 3 Replies View Related

C++ :: How To Parse XML File With Standard Library

Mar 11, 2015

How can I parse an .xml file with just C++ Standard Library?

View 14 Replies View Related

C++ :: Parse A String Containing Number And Characters From File

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.

View 1 Replies View Related

C/C++ :: How To Parse Contents Of File To Remove Comments

Mar 12, 2015

I am working on a program where I am reading in a text file to be parsed to load data objects into their appropriate classes. I have a class to load in this file and to parse its contents. I am at the point where I would like to include the ability to have both C and C++ style comments in this text file. My current class has a constructor that takes in const std::string for its file name. Upon construction I have a while loop that calls a member function getNextLine() as long as this is true this loader class object then calls parseGui(). All of this works correctly so far. Within the function getNextLine() looks like this:

// ----------------------------------------------------------------------------
// getNextLine()
// Returns True If It Got A Line Of Text (Could Be Blank If It Is All Commented Out Or
// If It Truly Was A Blank Line). False Is Returned When There Is No More Data In The File
bool GuiLoader::getNextLine() {
if ( !_file.readLine( _strLine ) ) {
return false;

[Code] ....

As you can see this getNextLine() method reads in a single line of text and saves it into its member variable which is a std::string. It increments the line number, then a utility function trims out leading and ending white spaces. The next part is where this class calls a member function to remove comments. It is in here where I need to parse the string to look for comments either "//" C++ style line comments or "/* ... */" C style block comments that can span multiple lines. I have tried many different ways to go about doing this, and I am stuck on the C style comments. A note to consider is this: the way this code is designed is reading in a line of text from the file into a string variable and in doing so it is not logical for me to read in the complete file and do a pre-parse scan or analyzer.

This is what I have so far, however there are still cases that this code will fail on

// ----------------------------------------------------------------------------
// removeComments()
void GuiLoader::removeComments() {
const unsigned tokenLength = 1;
static std::string::size_type indexA;
static std::string::size_type indexB;
const std::string commentStartingToken( "/" );
const std::string blockCommentStartingQualifier( "*" );

[Code] .....

An example of where this code will fail is when it encounters a single '/' any where on a line of text as it goes into an infinite loop. I am not sure on how to go about skipping this lonely '/' and advanced the index to look for a possible next '/' that belongs to a '//' or a '/*'. I know that this is sort of trivial, but for some reason or another I am having writers block.

View 14 Replies View Related

C# :: Using Split Method To Parse Line In CSV File

Jun 6, 2014

I'm using the Split method to parse line in a csv file. The following code works if there are no commas in the text of my data.

string csvLine;
string[] splitLine;
csvLine = "Jim Borland,1234,Never dreams in code";
splitLine = csvLine.Split(',');

But if I have commas in the some of the text as below I get then wrong output. So I need split on a commas which are not enclosed in double quotes.

string csvLine;
string[] splitLine;
csvLine = ""Jim,C,Borland",1234,"Never dreams in code"";
splitLine = csvLine.Split(',');

The output I want is:

Jim,C,Borland
1234
Never dreams in code

I found this :

If your strings are all well-formed it is possible with the following regular expression:

String[] res = str.split(",(?=([^"]|"[^"]*")*$)");

The expression ensures that a split occurs only at commas which are followed by an even (or zero) number of quotes ... and thus not inside such quotes).

Nevertheless, it may be easier to use a simple non-regex parser.

But the .split gives me an error and .Split doesn't work either.

View 5 Replies View Related

C++ :: Parse TXT File - How To Get X And Y Coordinates Of Each Control Points From 2 Images

Jan 30, 2013

I have a text file with the following format

//MAIN OBJECT
Object = ControlNetwork
Created = 2013-01-28T12:26:17

//FIRST CONTROL POINT OBJECT
Object = ControlPoint
PointId = 1

[Code] ....

I want to get the X and Y coordinates of the each control points from 2 images.

For example, from the above file i want to retrieve such information:

-PointID=1 and point coordinates are 802,725(from image1) and 480,708 (from image2)

-PointID=2 and point coordinates are 317,130(from image1) and 128,116 (from image2)

There can be millions of points in such a text file. So what is the best way to parse these files?

View 1 Replies View Related

C :: Find Parse Error On Line 24 Reading From A File Using Structures

Mar 6, 2015

im trying to read employee information from a file using structures but im having problems with getting the file to open and read in the information

Code:

Write a programt that inputs (at most 50) records from a sequential file
#include <stdio.h>
#include <stdlib.h>
struct employee // employee structure definition
}

[code]....

View 13 Replies View Related

C++ :: Multiple Of CSV File Used As Input / Extracting Data To A Output File - Getline Function

Jun 4, 2013

I have written a C++ program I have multiple of CSV file used as input, which I open one at a time and close it after extracting data to a output file which is the only file.

I run getline(inFile,line);
outFile << line << endl;

I run this code, and only part of it is goes to the output file I got, also have spacing randomly to specific file and inconsistent

But when I slower the code, like system("Pause") in the loop, I can get extract what I want perfectly....

Is my program running to fast, why getline would be skipping part of what things I want?

View 11 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved