Shell Programming and Scripting

Hi,
I'm a newbie in shell script.

I have a problem in running my a.out in a bash shell script named vetri . The following is the code.

#!bash/bin
./a.out abc.xyz

where ./a.out is a c++ bin file and abc.xyz is an argument. My ./a.out expects an input (cin >> temp). How can I give the input for my ./a.out file in shell script itself.

I'm not certain I completly understand you but here's what I believe you are asking for:

Code:

#!/bin/bash
./a.out abc.xyz < your.input.file

Note that your header #!bash/bin is not likely to work correctly unless you have a very oddly located and named shell.

Hi Smiling Dragon,

My question is, I'm executing a C++ file inside a shell script. My C++ file expects an input ( a simple "cin >>" ). How can I give my input for C++ file in shell script itself.

Below is the code given.

Code:
#!/bin/bash
./a.out abc.xyz

a.out is my c++ executable and it's called with an argument abc.xyz. After executing this line, it will ask for an input to be entered from a keyboard.

All I wanted was, I should be able to set the input in shell script itself instead of entering it from keyboard.Just assume the input is defined. I didnt want to intervene.


~lchokka

and my response is, read about HERE documents
Here document - Wikipedia, the free encyclopedia

You can put that input inside the file 'your.input.file' or do as broli is saying and use the HERE syntax to pass the input to your program. Both will do what you're looking for.