C++ text file line by line/each line to string/array
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The only ways I know of(maybe wrong)is to read the whole file into a buffer add to it and rewrite the whole file.
read a line in append to it, write the new line to another file until to have written all the data plus what you want to append to it.
reading non-integer values from a table in a text file
I have a similar problem, but with non-integer numbers
I would like to read a table like this, from a txt file. The first line represents the x_values of the table, the second line provides the y_values of the table, and then it follows the z_values for the different x and y values
the problem is that I need to read and save this kind of information from different files, which will not always have the same dimensions
Could anyone help me, please?
Thanks so much
I have modified the file provided by dakensta on the 12-18-03 at 01:40 AM and it works fine with Microsoft VISUAL C++
But it does not work with Open Watcom compiler :-( It seems that the getline() function is not recognized...
Has anyone faced this problem before? How can I solve it? Thanks so much !!!
Last edited by new_cpp_programmer; 05-03-2007 at 03:17 AM.
Hi, I have written a similar program using STL.
Here are the details of my program. It reads a text file and then asks the user to enter a string.
It then displays how many times the string occurs and also prints the lines in which it occurs.
I hope it solves your purpose ?
So here's the code :
cerr<<"\nThe file could not be opened.";
cout<<"\nEnter a word to search: ";
cout<<"\nThe number of matches = "<<words.count(search)<<'\n';
cout<<'\n'<<x<<" ) "<<iter->second<<'\n';
if(it1!=it2 && it1->second==x)
What the code does is that it stores each line number and line in a map and each word and its associated line number in a multimap(because each line may contain more than 1 similar words)
Rest is simple( i guess ?) :P
I usually have a hard time explaining things:-(, hope you'll figure out
Efficient way to read only 1st line from number of files
I am struck up with some problem. I am analyzing on an efficient way to read number of files. Actually I want to read only the first line from each of them.
There could be hundreds of them in the directory/sub-directories; but not huge in size.
Can anyone suggest a way I can do it without compromising too much on memory and performance.