Position 15 to 30

[Guest_imported]

How can I get the text from the text file of the position 15 to 30?

Ex:
Into the text file:

abcdefghijklmnopqrstuvwxyzabcdefghijk

Result:

pqrstuvwxyzabcd

Thank you in advanced

Paola S

 

[Zyrenthian]

there are multiple ways. If you are using cfile you can do a Seek to position 15 from the beginning and then read 16 characters.

If using ifstream you can do 14 gets and then do a getline with a buffer and read in 16 characters Or do 2 getlines and get one for 14 and then 1 for 16.


Matt

 

[joeGrammar]

you can also use the standard C functionality, such as fseek on a FILE variable

 

[IonelBurtan]

Use strncpy function.
Below is an example from MSDN:

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

void main( void )
{
char string[100] = &quot;Cats are nice usually&quot;;
printf ( &quot;Before: %s\n&quot;, string );
strncpy( string, &quot;Dogs&quot;, 4 );
strncpy( string + 9, &quot;mean&quot;, 4 );
printf ( &quot;After: %s\n&quot;, string );
}

Output
Before: Cats are nice usually
After: Dogs are mean usually


Hope this helps, s-)

Blessed is he who in the name of justice and goodwill, sheperds the weak through the valley of darkness...

http://www20.brinkster.com/ionelb

 

[Cagliostro]

see a short typical C++ sample for strings:

#include<string>
#include<iostream>
using namespace std;
int main(int argc, char* argv[])
{
string cccc = &quot;gahahiajhihello worldajhaihjatihjaihjahihafhiphjahj&quot;;
string xxx = cccc.substr(10,11);
cout<<xxx.c_str()<<endl;
return 0;
} John Fill

ivfmd@mail.md

 

[fheyn]

strncpy() or string.substr() are fine but she wants to read the substring directly from a textfile.

 

[IonelBurtan]

The she should use firs fseek and fread to read the necesary string into a buffer (or char*). s-)

Blessed is he who in the name of justice and goodwill, sheperds the weak through the valley of darkness...

http://www20.brinkster.com/ionelb