IBRD reads expected response unde ICBC but does not in QBASIC

[sluggish]

when I use ibwrt with my device, it works OK in all cases (I assume). When I read with ibrd, it reads OK when only one number is in the response, but when there are three numbers, it does not read a bit. I set receiving string variable to " ", so it is not zero length, but it still remains the same after ibrd. when I use interactive control, the response reads OK, three numbers with commas, what is scoop?

[DiegoF]

Hi,

I'm not to familiar with QBASIC, but I'll explain the what happens with the strings in C. Maybe in QBASIC they are handled the same.

In C, string a NULL terminated arrays of characters. The string you use, " ", would not be interpreted as an empty string, but as a 4 character string (filled with spaces). To write and empty string you would wirte '\0' or just 0 (no qoutes).

In the examples provided (for C) the buffer that stores the result of ibrd is terminated using the ibcnt variable:

buffer[ibcnt] = '\0'

This is needed because the ibrd functions does not terminate the string.

Hope this helps.

DiegoF.


In the examples we provide