C,C++ - Passing one program value/output to another program

[namasivayam]

Can anyone tell me how to pass the variable (or) output result from one C program to another C++ program. (without using files).

Urgent.
Thanks.

[UgoDeschamps]

Can anyone tell me how to pass the variable (or) output result from one C program to another C++ program. (without using files).

Are the 2 program actively running, or the C "opens" the C++ program with some parameters?

If the C++ is running,
- file (easiest)
- socket (not the fastest)
- direct memory addressing (dangerous)

if the C++ program isnt running, simply pass the parameter as you open it and get the (args[]) with the proper option you want to make it do

[alps123456]

Well, that's not sufficient info, but if you plan to run the two programs separately and you want to redirect the output, you can just pipe/redirect the output

do something like

program1 | program2 or program1 > program2, depending upon what your needs are