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Input File problems: input_file.fail() is true and idk why
The 2019 Stack Overflow Developer Survey Results Are InHow to get error message when ifstream open failsHow do I check whether a file exists without exceptions?How do I copy a file in Python?Why can templates only be implemented in the header file?Why should text files end with a newline?How do I include a JavaScript file in another JavaScript file?Why is “using namespace std” considered bad practice?Writing files in Node.jsHow to read a file line-by-line into a list?Why are elementwise additions much faster in separate loops than in a combined loop?Why is it faster to process a sorted array than an unsorted array?
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My code is supposed to open a file and work with the data that it reads in. My code looks like this:
#include <iostream>
#include <iomanip>
#include <fstream>
using namespace std;
int main()
{
ifstream input_file;
input_file.open("practice.txt");
if (input_file.fail())
cout << "Attempt to open file failed." << endl;
else
It always returns "attempt to open file failed". I am definitely using the correct file name, so what are some reasons that the file isn't opening?
How do I solve this issue?
EDIT: spoke to another girl in my class with a Mac and her code works perfectly when not run on Mac but won't open the file when she runs it on her computer so I think it's a problem with my compiler. Thanks for the help!!
c++ file
asked Mar 22 at 4:41
KateKate
62
|
show 1 more comment
My code is supposed to open a file and work with the data that it reads in. My code looks like this:
#include <iostream>
#include <iomanip>
#include <fstream>
using namespace std;
int main()
{
ifstream input_file;
input_file.open("practice.txt");
if (input_file.fail())
cout << "Attempt to open file failed." << endl;
else
It always returns "attempt to open file failed". I am definitely using the correct file name, so what are some reasons that the file isn't opening?
How do I solve this issue?
EDIT: spoke to another girl in my class with a Mac and her code works perfectly when not run on Mac but won't open the file when she runs it on her computer so I think it's a problem with my compiler. Thanks for the help!!
c++ file
asked Mar 22 at 4:41
KateKate
62
2
The most likely reason is that the directory from where the program runs and the directory where the file is are different. Use absolute path to the file to make sure permissions are not responsible for the failure to open the file.
– R Sahu
Mar 22 at 4:43
Search term: "Working Directory"
– user4581301
Mar 22 at 4:46
@RSahu how would I do that? I'm using Code::Blocks as my compiler and it creates a folder in the documents on my computer, so I put the file in the folder that it created for this project. Where is the best place to put it?
– Kate
Mar 22 at 5:01
Assuming you are using Windows, move the input file, practice.txt, to "C:". Change the line to open the file toinput_file.open("C:\practice.txt"). Please note the use two backward slashes - "\". Don't change it to one.
– R Sahu
Mar 22 at 5:06
I'm using a Mac. Are you familiar with any equivalents for that?
– Kate
Mar 22 at 5:09
|
show 1 more comment
My code is supposed to open a file and work with the data that it reads in. My code looks like this:
#include <iostream>
#include <iomanip>
#include <fstream>
using namespace std;
int main()
{
ifstream input_file;
input_file.open("practice.txt");
if (input_file.fail())
cout << "Attempt to open file failed." << endl;
else
It always returns "attempt to open file failed". I am definitely using the correct file name, so what are some reasons that the file isn't opening?
How do I solve this issue?
EDIT: spoke to another girl in my class with a Mac and her code works perfectly when not run on Mac but won't open the file when she runs it on her computer so I think it's a problem with my compiler. Thanks for the help!!
c++ file
asked Mar 22 at 4:41
KateKate
62
My code is supposed to open a file and work with the data that it reads in. My code looks like this:
#include <iostream>
#include <iomanip>
#include <fstream>
using namespace std;
int main()
{
ifstream input_file;
input_file.open("practice.txt");
if (input_file.fail())
cout << "Attempt to open file failed." << endl;
else
It always returns "attempt to open file failed". I am definitely using the correct file name, so what are some reasons that the file isn't opening?
How do I solve this issue?
EDIT: spoke to another girl in my class with a Mac and her code works perfectly when not run on Mac but won't open the file when she runs it on her computer so I think it's a problem with my compiler. Thanks for the help!!
c++ file
c++ file
asked Mar 22 at 4:41
KateKate
62
asked Mar 22 at 4:41
KateKate
62
edited Mar 22 at 14:40
Kate
asked Mar 22 at 4:41
KateKate
62
asked Mar 22 at 4:41
KateKate
62
asked Mar 22 at 4:41
KateKate
62
62
2
The most likely reason is that the directory from where the program runs and the directory where the file is are different. Use absolute path to the file to make sure permissions are not responsible for the failure to open the file.
– R Sahu
Mar 22 at 4:43
Search term: "Working Directory"
– user4581301
Mar 22 at 4:46
@RSahu how would I do that? I'm using Code::Blocks as my compiler and it creates a folder in the documents on my computer, so I put the file in the folder that it created for this project. Where is the best place to put it?
– Kate
Mar 22 at 5:01
Assuming you are using Windows, move the input file, practice.txt, to "C:". Change the line to open the file toinput_file.open("C:\practice.txt"). Please note the use two backward slashes - "\". Don't change it to one.
– R Sahu
Mar 22 at 5:06
I'm using a Mac. Are you familiar with any equivalents for that?
– Kate
Mar 22 at 5:09
|
show 1 more comment
2
The most likely reason is that the directory from where the program runs and the directory where the file is are different. Use absolute path to the file to make sure permissions are not responsible for the failure to open the file.
– R Sahu
Mar 22 at 4:43
Search term: "Working Directory"
– user4581301
Mar 22 at 4:46
@RSahu how would I do that? I'm using Code::Blocks as my compiler and it creates a folder in the documents on my computer, so I put the file in the folder that it created for this project. Where is the best place to put it?
– Kate
Mar 22 at 5:01
Assuming you are using Windows, move the input file, practice.txt, to "C:". Change the line to open the file toinput_file.open("C:\practice.txt"). Please note the use two backward slashes - "\". Don't change it to one.
– R Sahu
Mar 22 at 5:06
I'm using a Mac. Are you familiar with any equivalents for that?
– Kate
Mar 22 at 5:09
2
2
The most likely reason is that the directory from where the program runs and the directory where the file is are different. Use absolute path to the file to make sure permissions are not responsible for the failure to open the file.
– R Sahu
Mar 22 at 4:43
The most likely reason is that the directory from where the program runs and the directory where the file is are different. Use absolute path to the file to make sure permissions are not responsible for the failure to open the file.
– R Sahu
Mar 22 at 4:43
Search term: "Working Directory"
– user4581301
Mar 22 at 4:46
Search term: "Working Directory"
– user4581301
Mar 22 at 4:46
@RSahu how would I do that? I'm using Code::Blocks as my compiler and it creates a folder in the documents on my computer, so I put the file in the folder that it created for this project. Where is the best place to put it?
– Kate
Mar 22 at 5:01
@RSahu how would I do that? I'm using Code::Blocks as my compiler and it creates a folder in the documents on my computer, so I put the file in the folder that it created for this project. Where is the best place to put it?
– Kate
Mar 22 at 5:01
Assuming you are using Windows, move the input file, practice.txt, to "C:". Change the line to open the file to
input_file.open("C:\practice.txt"). Please note the use two backward slashes - "\". Don't change it to one.– R Sahu
Mar 22 at 5:06
Assuming you are using Windows, move the input file, practice.txt, to "C:". Change the line to open the file to
input_file.open("C:\practice.txt"). Please note the use two backward slashes - "\". Don't change it to one.– R Sahu
Mar 22 at 5:06
I'm using a Mac. Are you familiar with any equivalents for that?
– Kate
Mar 22 at 5:09
I'm using a Mac. Are you familiar with any equivalents for that?
– Kate
Mar 22 at 5:09
|
show 1 more comment
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2
The most likely reason is that the directory from where the program runs and the directory where the file is are different. Use absolute path to the file to make sure permissions are not responsible for the failure to open the file.
– R Sahu
Mar 22 at 4:43
Search term: "Working Directory"
– user4581301
Mar 22 at 4:46
@RSahu how would I do that? I'm using Code::Blocks as my compiler and it creates a folder in the documents on my computer, so I put the file in the folder that it created for this project. Where is the best place to put it?
– Kate
Mar 22 at 5:01
Assuming you are using Windows, move the input file, practice.txt, to "C:". Change the line to open the file to
input_file.open("C:\practice.txt"). Please note the use two backward slashes - "\". Don't change it to one.– R Sahu
Mar 22 at 5:06
I'm using a Mac. Are you familiar with any equivalents for that?
– Kate
Mar 22 at 5:09