Which of the following is a hardware device that converts a digital data frame from

CSU/DSU (Channel Service Unit/Data Service Unit)

Explanation:

A CSU/DSU (Channel Service Unit/Data Service Unit) is a electronic interface that connects  data terminal hardware, such as a modem,  a digital circuit.

The CSU / DSU has two distinct tasks to implement.

The channel service unit (CSU) is accountable for the telecommunications network connection,  whereas the data service unit (DSU) is accountable for the management of the DTE interface.

You're substracting one from the variable "exponent" with every iteration of the loop, and you told it to break out of the loop once "exponent" is 0, therefore, it's always going to end up as 0 at the end.

If you want to keep the input from the user, then declare another variable like "counter" and assign the value of "exponent" to it and use it for the loop

Or even better, do this for the loop:

for(int i = 0; i < exponent; i++)

{

//Code here

}