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kenny6666 [7]
3 years ago
7

Write a program that asks the user how many numbers will be entered and then has the user enter those numbers. When this is done

, report to the user the position of the first 7 entered and the last 7 entered. By position we mean, for example, that if the first 7 is the 2nd number entered then its position would be 2.

Computers and Technology
1 answer:
KATRIN_1 [288]3 years ago
7 0

Answer:

<em>The program written in Python 3 is as follows;</em>

<em>The program does not make use of comments; however, see explanation section for detailed line by line explanation of the program</em>

num = int(input("Number of Inputs: "))

mylist = []

userinput = int(input("Enter a digit: "))

i = 1

while i < num:

     mylist.append(userinput)

     userinput = int(input("Enter a digit: "))

     i += 1

   

try:

     first7 = mylist.index(7)+1

     print('The first position of 7 is ',first7)

     last7 = num - 1 - mylist[::-1].index(7)

     print('The last position of 7 is ',last7)

except:

     print('7 is not on the list')

Explanation:

This line prompts user for the number of inputs

num = int(input("Number of Inputs: "))

This line declares an empty list

mylist = []

This line inputs the first number into the empty list

userinput = int(input("Enter a digit: "))

The italicized lines represent an iteration that allows user to input the numbers into the empty list.

<em>i = 1</em>

<em>while i < num:</em>

<em>      mylist.append(userinput)</em>

<em>      userinput = int(input("Enter a digit: "))</em>

<em>      i += 1</em>

The try-except is used to check the presence of 7 in the list

try:

This checks the first occurrence of 7

     first7 = mylist.index(7)+1

This prints the first occurrence of 7

     print('The first position of 7 is ',first7)

This checks the last occurrence of 7

     last7 = num - 1 - mylist[::-1].index(7)

This prints the last occurrence of 7

     print('The last position of 7 is ',last7)

The following is executed if there's no occurrence of 7

except:

     print('7 is not on the list')

See Attachments for sample runs

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using namespace std;   //to identify objects like cin cout

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               continue;             }  

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           do{  //start of do while loop

               cout<<"(cannot be less than "<<MinRooms<<"): ";  //error message

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Explanation:

The program first prompts the user to enter number of floors in the hotel. Lets say user enters 6. This is stored in NoOfFloors So

NoOfFloors = 6

So the loop runs for 6 times

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NoOfRooms = 12

TotalRooms += NoOfRooms;

this statement keeps adding number of rooms to TotalRooms so

TotalRooms = 12

Next program asks user about the number of occupied rooms. Lets say user enters 10 so this is stored in OccupiedRooms so

OccupiedRooms = 10

this statement keeps adding number of rooms to TotalOccupied so

 TotalOccupied += OccupiedRooms;

TotalOccupied = 10

At next iteration program asks user again to enter number of rooms in floor 2. Suppose user enters 14 so

NoOfRooms = 12

TotalRooms += NoOfRooms;

TotalRooms = 12+14

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OccupiedRooms = 8

this statement keeps adding number of rooms to TotalOccupied so

 TotalOccupied += OccupiedRooms;

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For floor 6: Suppose user enters 11

TotalOccupied = 10+8 + 14+10+11

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Now the loop breaks

Hence

TotalRooms = 65

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The occupancy rate is: 100*(TotalOccupied/TotalRooms) = 100*(53/65) = 81.5385

The output of the program is attached in a screenshot.

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