473,395 Members | 1,696 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,395 software developers and data experts.

search for a string

20
Hi everyone,
Does there exist a function to seach for a string in a file, when I have a pointer to a character array:

Expand|Select|Wrap|Line Numbers
  1. ifstream infile = f.c_str();
Apr 23 '08 #1
2 1251
weaknessforcats
9,208 Expert Mod 8TB
No. Strings don't exist in files. Data exists in files and you have to read the data into your array and interpret it.

That requires you know the format of the data in the disc file.

Say, if it's a text file, you read a record into a buffer using the read method or use the getline() function to do it for you. Then you can convert the buffer into a string object.

Then you can compare what you read with what you are looking for and if that wasn't it you read again and repeat the process until you read end of file.

If you know the STL you might try using input iterators with the find() algorithm. It might save you writing the above code yourself.
Apr 23 '08 #2
madshov
20
Thanks for the reply. I figured it out!
Apr 23 '08 #3

Sign in to post your reply or Sign up for a free account.

Similar topics

10
by: Anand Pillai | last post by:
To search a word in a group of words, say a paragraph or a web page, would a string search or a regexp search be faster? The string search would of course be, if str.find(substr) != -1:...
4
by: Ken Fine | last post by:
I'm looking to find or create an ASP script that will take a string, examine it for a search term, and if it finds the search term in the string, return the highlighted search term along with the...
22
by: Phlip | last post by:
C++ers: Here's an open ended STL question. What's the smarmiest most templated way to use <string>, <algorithms> etc. to turn this: " able search baker search charlie " into this: " able...
32
by: tshad | last post by:
Can you do a search for more that one string in another string? Something like: someString.IndexOf("something1","something2","something3",0) or would you have to do something like: if...
0
by: Hriday | last post by:
Hi there, I am working on a web application in ASP.NET My web server and AD machine are in the same domain but located on diffrent phisical machine, I am not able to search user's info by the...
1
by: Eric | last post by:
Hi: I have two files. I search pattern ":" from emails text file and save email contents into a database. Another search pattern " field is blank. Please try again.", vbExclamation + vbOKOnly...
4
by: BenCoo | last post by:
Hello, In a Binary Search Tree I get the error : Object must be of type String if I run the form only with the "Dim bstLidnummer As New BinarySearchTree" it works fine. Thanks for any...
0
by: | last post by:
I have a question about spawning and displaying subordinate list controls within a list control. I'm also interested in feedback about the design of my search application. Lots of code is at the...
0
by: JamesOo | last post by:
I have the code below, but I need to make it searchable in query table, below code only allowed seach the table which in show mdb only. (i.e. have 3 table, but only can search either one only,...
0
Debadatta Mishra
by: Debadatta Mishra | last post by:
Introduction In this article I will provide you an approach to manipulate an image file. This article gives you an insight into some tricks in java so that you can conceal sensitive information...
0
by: Charles Arthur | last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
0
by: ryjfgjl | last post by:
If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...
0
by: ryjfgjl | last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
0
BarryA
by: BarryA | last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
1
by: nemocccc | last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
1
by: Sonnysonu | last post by:
This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...
0
by: Hystou | last post by:
There are some requirements for setting up RAID: 1. The motherboard and BIOS support RAID configuration. 2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
0
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
0
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.