terminal: program input from file

Question

i have a file "test.txt" which has a list of numbers, like this

I also have an executable which is a sorting algorithm, for example heapsort. when i type ./heapsort it asks me for input untill i press CTRL+D.

How can i make that the ./heapsort input is test.txt?

I have a program "generate". so if i put ./generate 20 | ./heapsort it prints the ordered list. How can i make heapsort read from the text file created with ./generate 20 > test.txt

braindf · Accepted Answer · 2014-09-05 17:22:42Z

1

Execute you program like this:

./heapsort < test.txt

This redirect the standard input to your file.

Also you may consider change your program to stop asking for inputs after a certain value or when reach the end of the file.

edited Sep 5, 2014 at 17:22

answered Sep 5, 2014 at 17:02

braindf

7845 silver badges16 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Ammaro · Accepted Answer · 2014-09-05 17:02:48Z

1

on Linux\unix : cat test.txt | ./heapsort

answered Sep 5, 2014 at 17:02

Ammaro

3802 silver badges14 bronze badges

Collectives™ on Stack Overflow

terminal: program input from file

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related