Visit Our UNIX and Linux User Community


[SOLVED] C++ print next line until line.empty


 
Thread Tools Search this Thread
Top Forums Programming [SOLVED] C++ print next line until line.empty
# 1  
Old 11-21-2012
[SOLVED] C++ print next line until line.empty

Hi, could you please help with the following:
I have an input file like:
Code:
one 
two
 
three
four
five
 
six

I want to print the lines starting from 'three' to the empty line.
Something like that:
Code:
if ( line == "three" )
{
     while ( !line.empty() )
     {
           cout << line << endl;
           line++;
      }
}

Could you please help, how to do that.

---------- Post updated at 05:48 PM ---------- Previous update was at 04:47 PM ----------

I fix it:
Code:
if ( line == "three" )
{
     cout << line << endl;
     while ( !line.empty() && getline(myfile, line))
     {
           cout << line << endl;
      }
}

Output:
Code:
three
four
five


Previous Thread | Next Thread
Test Your Knowledge in Computers #92
Difficulty: Easy
The Unix ls command can only lists files in the current directory.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Need a program that read a file line by line and prints out lines 1, 2 & 3 after an empty line...

Hello, I need a program that read a file line by line and prints out lines 1, 2 & 3 after an empty line... An example of entries in the file would be: SRVXPAPI001 ERRO JUN24 07:28:34 1775 REASON= 0000, PROCID= #E506 #1065: TPCIPPR, INDEX= 003F ... (8 Replies)
Discussion started by: Ferocci
8 Replies

2. Shell Programming and Scripting

[Solved] How to separate one line to mutiple line based on certain number of characters?

hi Gurus, I need separate a file which is one huge line to multiple lines based on certain number of charactors. for example: abcdefghi high abaddffdd I want to separate the line to multiple lines for every 4 charactors. the result should be abcd efgh i hi gh a badd ffdd Thanks in... (5 Replies)
Discussion started by: ken6503
5 Replies

3. Shell Programming and Scripting

I need to know how to replace a line after a pattern match with an empty line using SED

Hi How Are you? I am doing fine! I need to go now? I will see you tomorrow! Basically I need to replace the entire line containing "doing" with a blank line: I need to the following output: Hi How Are you? I need to go now? I will see you tomorrow! Thanks in advance.... (1 Reply)
Discussion started by: sags007_99
1 Replies

4. UNIX for Dummies Questions & Answers

[Solved] Print a line using a max and a min values of different columns

Hi guys, I already search on the forum but i can't solve this on my own. I have a lot of files like this: And i need to print the line with the maximum value in last column but if the value is the same (2 in this exemple for the 3 last lines) i need get the line with the minimum value in... (4 Replies)
Discussion started by: MetaBolic0
4 Replies

5. Shell Programming and Scripting

[Solved] making each word of a line to a separate line

Hi, I have a line which has n number of words with separated by space. I wanted to make each word as a separate line. for example, i have a file that has line like i am a good boy i want the output like, i am a good (8 Replies)
Discussion started by: rbalaj16
8 Replies

6. Shell Programming and Scripting

awk print last line returns empty string

hello I have a file with lines of info separated with "|" I want to amend the second field of the last line, using AWK my problem is with geting awk to return the last line this is what I am using awk 'END{ print $0 }' myFile but I get an empty result I tried the... (13 Replies)
Discussion started by: TasosARISFC
13 Replies

7. Shell Programming and Scripting

Fill the empty line by adding line before blank line

FIle A "A" 2 aa 34 3 ac 5 cd "B" 3 hu 67 4 fg 5 gy output shud be A"" 2 aa 34 "A" 3 ac 34 "A" 5 cd 34 "B" 3 hu 67 "B" 4 fg 67 "B" 5 gy 67 (6 Replies)
Discussion started by: cdfd123
6 Replies

8. Shell Programming and Scripting

[Solved] Problem in reading a file line by line till it reaches a white line

So, I want to read line-by-line a text file with unknown number of files.... So: a=1 b=1 while ; do b=`sed -n '$ap' test` a=`expr $a + 1` $here do something with b etc done the problem is that sed does not seem to recognise the $a, even when trying sed -n ' $a p' So, I cannot read... (3 Replies)
Discussion started by: hakermania
3 Replies

9. Shell Programming and Scripting

howto add line as a first line into a non empty file

Hi Trying to do like this : echo "$variable1\n $(cat file.txt)" but it only adds one time. When I run this cmd again with different variable it only replaces line of variable1. How to add constantly line into first line in file ? (3 Replies)
Discussion started by: presul
3 Replies

10. Shell Programming and Scripting

How to print empty line when the a field is changed

Hi all, I have this input file .. BSS01 107 Swafieh 11/06/2008 12:06:57 BSS01 111 Ramada_Hotel 12/06/2008 11:37:20 BSS01 147 Kalha_Rep 11/06/2008 19:13:39 BSS01 147 Kalha_Rep ... (9 Replies)
Discussion started by: yahyaaa
9 Replies

Featured Tech Videos