Shell script to run program that asks for input

Question

I have a C program in which two scanf() are done.

I need to write a shellscript that will run the program and give it the arguments too.

The problem is that all I could come up with is how to pipeline an argument into the program as a command line arguments which is not what I need.

Any help appreciated.

Answer 1

This should work

echo "some input" | yourprog

e.g. echo "1 1 + p" | dc