c++ file string from text file into 1d array
 

i need help in C++ arrays

i have a text file with

David (name)
1 ( some variable )
bowler
2 (stats)
3
4

i can read the file in and store them into a 1d array however it stores each character in one element when i want to have each line in one element. please can any one help asap thanks

code already:

#include <stdlib.h>
#include <iostream>
using namespace std;
#include<string>
#include<string.h>
#include<fstream>
#include<iomanip>

using std::setw;
#include <conio.h> //For getch function
using std::cout;
using std::endl;


const int N = 10;

ofstream FOut; //File Out
ifstream FIn; //File In
string File; //File Name

void main()
{
/
char arr[N], *p;

cout <<"Enter file name:"<<endl;
cin >> File;
FIn.open( File.c_str() );


for(int i = 0; i<N; i++)

{


FIn >> arr[i];

}

cout << *(arr) << "";


}

Store each line in a C++ string. The problem with character arrays is that you need to know their size at compile time.

graeme.

Thanks for your reply Hivemind and graeme.

the code runs fine Hivemind, however i need it to be stored in a 1d array as i will need access to the elements, throughout the program. i need to make comparsions with the elements to other arrays i have

The vector I used is one-dimensional..a two dimensional vector would be a vector of vectors of some tyoe.

oh ok i see, sorry stupid question i am quite new to c++. to print out one line of the txt file would i have a counter then increment it with line? or how could the vector just point to a particular line in the text file

#include <cstdlib>
#include <fstream>
#include <iostream>
#include <string>
#include <vector>

int
main()
{
std::cout << "Enter filename: ";

std::string filename;

cin >> filename;

std::ifstream file(filename.c_str());

if(!file)
{
std::cerr << "Error opening file " << filename << std::endl;

return EXIT_FAILURE;
}

std::string line;
std::vector<std::string> contents_of_file;

while(getline(file, line))
{
contents_of_file.push_back(line);

std::cout << "Read line " << line << std::endl;
}

std::cout << "Read " << contents_of_file.size() << " lines from the file." << std::endl;
std::cout << "Any particular line is accessed using contents_of_file[line_number-1]."
<< std::endl;

}

so if i wanted the line two to be printed i would have this code line:
std::cout << contents_of_file[line_number-1];

line_number has to be declared first to which value

If you read ten lines into the vector they have indexes 0-9. So if you want the first line, the index should be 0, the last the index would be nine, the fifth the index would 4. line number - 1...

i have stored a vector in a class, how do i get access to it from another class?

It depends if you made the vector public, private or protected.

If it is public then you can access directly via an object of that class
If the vector is either private or protected then it is best to write an access method
and the access method will return the appropriate element of the vector (maybe checking that the element actually exists)

I hope that helps a little.

graeme.

thanks for the tip,

I have a vector vector<string> the; set up in a class as public
then in another class what would i do to get access to it. would i have to use a pointer in the first class and then get reference to it?
public:
myObj.the;
myObjPtr->the[0];






thanks
graeme

Just write a simple access method.

Call it like you call any non-static member function. You can catch the return
value in const string reference if you dont need to modify it to speed up performance.

i got two classes, 1 class has a vector where values are read in, i want a 2nd class to access the vector from class 1 to check the values in the a particlar element. the main cpp file will call these functions.
how would i go about this? i can't seem to access the vector in another class, and when i do it doesn't display anything. even though i have something in the vector

any ideas?

I just showed you...

sorry about that thanks

Do it in C
 

#include <stdio.h>
#include <string.h>
#include <malloc.h>

#define MAX_STRING_LENGTH 4096
#define MAX_LIST_SIZE 256

int main(int argc, char *argv[])
{
FILE *fidFile = NULL;
char strBuffer [MAX_STRING_LENGTH] = "";
char *strList[MAX_LIST_SIZE];
int intLast = 0;
int intCount = 0;

printf ("Test program with %s\n", argv[1]);

if ((fidFile = fopen (argv[1], "rt")))
{
while (!feof (fidFile) && fgets (strBuffer, MAX_STRING_LENGTH, fidFile))
{
printf (strBuffer);

strList[intLast++] = (char *)malloc (strlen (strBuffer));
}
}

for (; intCount < intLast; intCount++)
{
printf ("%s", strList[intCount]);
}

return 0;
}