Modify the program in Figure 6.8 so that it separately...

Modify the program in Figure 6.8 so that it separately computes and prints the sum of all positive numbers and all negative numbers and stops when it sees the value 0 . For example, given the input $12,-2,14,1,-7,0$ your program should output the two values 27 (the sum of the three positive values 12,14 , and 1 ) and -9 (the sum of the two negative numbers -2 and -7 ) and then halt.

Modify the program in Figure 6.8 so that it separately computes and prints the sum of all positive numbers and all negative numbers and stops when it sees the value 0 . For example, given the input $12,-2,14,1,-7,0$
your program should output the two values 27 (the sum of the three positive values 12,14 , and 1 ) and -9 (the sum of the two negative numbers -2 and -7 ) and then halt.

Key Concepts

Sentinel-Controlled Iteration

This concept involves using a special value, known as a sentinel, to mark the end of a sequence of inputs. Instead of knowing the number of inputs beforehand, the program continues to loop and processes data until it encounters the sentinel value, at which point it terminates the iteration. This is a common control structure in programming for handling unpredictable input lengths.

Conditional Statements

Conditional statements are used to execute different blocks of code based on whether certain conditions are met. In this context, they allow the program to separately process and determine whether an input number is positive or negative, applying the appropriate logic to accumulate the sums accordingly.

Accumulator Variables

Accumulator variables are used to keep a running total or aggregate value during iterative processes. Here, separate accumulator variables are maintained to hold the sum of positive numbers and the sum of negative numbers. With each input, the appropriate accumulator is updated based on the value's sign.

Input and Output Operations

Input and output operations refer to the methods used for receiving data from the user and displaying results back to the user. In this scenario, the program repeatedly accepts numerical input from the user and, after processing all inputs, prints the computed sums for both positive and negative numbers.

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