C++ :: Reading The Rest Of Line

May 4, 2012

I had a problem which i fixed it but couldn't fix it in a nice way. Lets understand my problem first, i have a file and has data in the following format

Id(int) and Description(string)

Code:
1 this is first line
1 continuity of first line
1 again first line
2 this is second line
3 this is 3rd line
3 continuity of 3rd line
3 again 3rd line
3 and again
4 fourth line

I was only interested in the integer part and ignore the description at first, it was easy because they are separated by a tab.

Here is my code for that problem

Code:
#include<iostream>
#include<fstream>
#include<string>
#include<cstdlib>
#include<limits>
using namespace std;
int main(){
string str;

[Code] .....

But now i need that description again which i ignored at first means the rest of the line, so how to get it? so is there any way of solving it? Here is my approach but i can't find any method to access to the rest of line

Code:
value = atoi(str.c_str());
(if value==1){
cout <<restOfTheLine<<endl;
}

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Aug 17, 2014

I am trying to read a file line by line and then do something with the informations, so my method looks like this:

Code:
void open_file(char *link) {
FILE *file = fopen(link, "r");
if (file == NULL) {
fprintf(stderr, "Could not open file.
");
exit(EXIT_FAILURE);

[Code] ....

1) The first complain of valgrind is at the line where I use fgets and its telling me (invalid write of size x), but I have allocated my line to 56000 and the read line is shorter, why is there a write size error then :S?

2) at the line where I realloc where I try to shrink the space he's telling me: Address .... is 0 bytes inside a block of size 56000, But I know i need only this space so why is there a write over space error :S??

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So I'm reading a file line by line and storing it backwards into a list. So if the file has has this format...
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2
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4

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Instead the code will store the last variable in all nodes. So the final list will look like this...
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Here is my code...

struct node *head = NULL;
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Apr 12, 2015

Im trying to read from a file, line by line, with no specified number of values in the file. Check out my code:

int main() {
string x;
ifstream fin;
int count = 0;
char ch;
fin.open("CWC_Master.txt");
if(!fin)

[Code] .....

Now, this works great! However, its skipping some lines. And I dont know why. For example: Lets say that the input file is:

superman toy
sm2335
19.99
batman toy
bm5532
25.99
aquaman toy
am6786
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Where it should output the above, instead it outputs every other one. Like:

superman toy
19.99
batman toy
25.99
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How can I fix my code so that it SIMPLY(i say simply because I am still a beginner coder) can read line by line?

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Code:
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Code:
//C
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[Code] ....

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...
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For example in the file,

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Code:

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Code:

void help::read_ref(const char* file_name){
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[code]....

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