Read integers from coupled lines in a text file
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I'm trying to read a text file formatted as in this example:
5 3
3 1 5
6 6
6 1 3 2 5 4
Where the lines are coupled, with the line above always being of length equal to 2 and the line below having length equal to the the last digit in the line above.
(Unfortunately this is from an old note I took and I don't remember what those numbers are actually supposed to mean, so I'm limiting myself to store them in a multidimensional vector form where they can be easily recovered).
In the beginning I was tring to read the digit which represents the length below to execute a loop of finite length, but in the end this is the code I wrote:
#include <fstream>
#include <sstream>
#include <string>
#include <vector>
int main()
{
std::string filname="data/file01.txt";
std::ifstream file01(filname);
std::vector<std::vector<int>> v;
std::string line;
while(getline(file01,line))
{
std::stringstream ls;
ls<<line;
int c;
std::vector<int> t;
while(!ls.eof())
{
ls>>c;
t.push_back(c);
}
v.push_back(t);
}
return 0;
}
This gives me a 2-dimensional vector that can be easily accessed, but I don't like having to convert both the file and each string to a stream and I don't like using nested vectors.
Is there a way to achieve this goal with more simple and elegant code (even if it means to lose make the code more specific)?
c++ io stream
asked 37 mins ago
maja
554
add a comment |
up vote
0
down vote
favorite
I'm trying to read a text file formatted as in this example:
5 3
3 1 5
6 6
6 1 3 2 5 4
Where the lines are coupled, with the line above always being of length equal to 2 and the line below having length equal to the the last digit in the line above.
(Unfortunately this is from an old note I took and I don't remember what those numbers are actually supposed to mean, so I'm limiting myself to store them in a multidimensional vector form where they can be easily recovered).
In the beginning I was tring to read the digit which represents the length below to execute a loop of finite length, but in the end this is the code I wrote:
#include <fstream>
#include <sstream>
#include <string>
#include <vector>
int main()
{
std::string filname="data/file01.txt";
std::ifstream file01(filname);
std::vector<std::vector<int>> v;
std::string line;
while(getline(file01,line))
{
std::stringstream ls;
ls<<line;
int c;
std::vector<int> t;
while(!ls.eof())
{
ls>>c;
t.push_back(c);
}
v.push_back(t);
}
return 0;
}
This gives me a 2-dimensional vector that can be easily accessed, but I don't like having to convert both the file and each string to a stream and I don't like using nested vectors.
Is there a way to achieve this goal with more simple and elegant code (even if it means to lose make the code more specific)?
c++ io stream
asked 37 mins ago
maja
554
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I'm trying to read a text file formatted as in this example:
5 3
3 1 5
6 6
6 1 3 2 5 4
Where the lines are coupled, with the line above always being of length equal to 2 and the line below having length equal to the the last digit in the line above.
(Unfortunately this is from an old note I took and I don't remember what those numbers are actually supposed to mean, so I'm limiting myself to store them in a multidimensional vector form where they can be easily recovered).
In the beginning I was tring to read the digit which represents the length below to execute a loop of finite length, but in the end this is the code I wrote:
#include <fstream>
#include <sstream>
#include <string>
#include <vector>
int main()
{
std::string filname="data/file01.txt";
std::ifstream file01(filname);
std::vector<std::vector<int>> v;
std::string line;
while(getline(file01,line))
{
std::stringstream ls;
ls<<line;
int c;
std::vector<int> t;
while(!ls.eof())
{
ls>>c;
t.push_back(c);
}
v.push_back(t);
}
return 0;
}
This gives me a 2-dimensional vector that can be easily accessed, but I don't like having to convert both the file and each string to a stream and I don't like using nested vectors.
Is there a way to achieve this goal with more simple and elegant code (even if it means to lose make the code more specific)?
c++ io stream
asked 37 mins ago
maja
554
I'm trying to read a text file formatted as in this example:
5 3
3 1 5
6 6
6 1 3 2 5 4
Where the lines are coupled, with the line above always being of length equal to 2 and the line below having length equal to the the last digit in the line above.
(Unfortunately this is from an old note I took and I don't remember what those numbers are actually supposed to mean, so I'm limiting myself to store them in a multidimensional vector form where they can be easily recovered).
In the beginning I was tring to read the digit which represents the length below to execute a loop of finite length, but in the end this is the code I wrote:
#include <fstream>
#include <sstream>
#include <string>
#include <vector>
int main()
{
std::string filname="data/file01.txt";
std::ifstream file01(filname);
std::vector<std::vector<int>> v;
std::string line;
while(getline(file01,line))
{
std::stringstream ls;
ls<<line;
int c;
std::vector<int> t;
while(!ls.eof())
{
ls>>c;
t.push_back(c);
}
v.push_back(t);
}
return 0;
}
This gives me a 2-dimensional vector that can be easily accessed, but I don't like having to convert both the file and each string to a stream and I don't like using nested vectors.
Is there a way to achieve this goal with more simple and elegant code (even if it means to lose make the code more specific)?
c++ io stream
c++ io stream
asked 37 mins ago
maja
554
asked 37 mins ago
maja
554
asked 37 mins ago
maja
554
asked 37 mins ago
maja
554
asked 37 mins ago
maja
554
554
add a comment |
add a comment |
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