Suppose that the input is 38 35 71 14 -1. What is the output of the following code? Assume all v

step 1 Let's find the output of the following program. In the first line, we have this sum equal to 0,

Suppose that the input is 38 35 71 14 -1. What is the output...

Key Concepts

Loop Control Structures (while loop)

Control structures such as the while loop allow the programmer to execute a block of code repeatedly as long as a specified condition remains true. Understanding how the condition is evaluated at each iteration is crucial, especially when combined with user input and sentinel values.

Accumulation Pattern

The accumulation pattern involves maintaining a running total or aggregate by continuously adding new values to a variable. This is a common technique in programming to compute sums, counts, or other aggregates over a series of inputs.

Input/Output Operations

This refers to the techniques used to read data from the user or a file (e.g., using cin in C++) and deliver output to the screen (e.g., using cout in C++). Understanding how data is input and output is essential to processing dynamic or user-provided data within a program.

Sentinel Value

A sentinel value is a special constant used to control the flow of input within a loop, indicating when the loop should terminate. In this context, a specific value (-1) is chosen to signal the end of meaningful input, enabling the loop to stop processing further data.

Transcript

00:01 Let's find the output of the following program.

00:03 In the first line, we have this sum equal to 0, which means the sum is initialized to 0.

00:09 And in the next line, we have n equal to 8.

00:12 That is, n is initialized to 8.

00:15 And in the statement number 30, we have this command, if n less than 1.

00:22 It is basically checking if n is less than 1, then go to 70.

00:28 That is line number 70 the control will be shifted to this statement let's check it out is 8 less than 1 no it is not which means it will not be shifted to 70 the it will be executing the following statement which means it will execute this and this as well as this so let's execute the statement number 40 in 40 we have sum equal to sum plus n star n which is basically adding the existing value of sum which is sum equal to 0 plus n star n if you replace n by 8 this will be 8 square is 64 so therefore the current value of sum is 64 and in the next line we can see that n is decremented by 2 n equal to n minus 2 is basically n is getting decremented by 2 which means n equal to 8 minus 2 so this gives the value of n equal to 6 and in the statement number 60 we have this statement go to 30 so this is an unconditional transfer so it will go to the statement number 30 so in when it comes to the statement number 30 it will start executing what we have done in the first loop so therefore we take the values of n and sum n equal to six now and sum equal to 64 is six less than one no it is not so therefore it will not go to 70 it will start executing the following statement so once again the sum is getting updated as sum plus square of n which means this is 64 plus square of n is which is 6 currently so 6 square is 36 so this is going to give the new value of sum as 100 therefore sum equal to 100 here and once again n is decremented by 2 therefore n equal to n minus 2 which is 6 minus 2 equal to 4 the new value or the updated value of n equal to 4 and once again there is an unconditional transfer to statement number 30 so again it comes back to this statement number 30 which means we are into the next loop in fact we are into the third loop so let's write down the values of n equal to 4 and the current value of sum equal to 100 so once again we will redo the all the operations which we are done in the first two loops that is sum will be updated by adding the current value of sum with the square of n which is 4 square is 16 so this is going to give the new value sum as 116, therefore sum equal to 116...

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