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bija089 [108]
2 years ago
14

Section 6.9 of your textbook ("Debugging") lists three possibilities to consider if a function is not working. Describe each pos

sibility in your own words. Define "precondition" and "postcondition" as part of your description. Create your own example of each possibility in Python code. List the code for each example, along with sample output from trying to run it.
Computers and Technology
1 answer:
ss7ja [257]2 years ago
4 0

Answer:

Explanation:

If a function is not working, there are three possibilities to consider: There is something wrong with the arguments the function is getting; a precondition is violated. There is something wrong with the function; a postcondition is violated. There is something wrong with the return value or the way it is being used.

a. precondition

A precondition is a prerequisite. It's the thing that has to happen before something else happens. ... When it's a verb, precondition means to prepare something (or someone).

b)a postcondition

A postcondition is the states the system can be in after the use case has ended. Consider the following: The states described by pre- or postconditions should be states that the user can observe. "The user has logged on to the system" or "The user has opened the document" are examples of observable states.

c)As in any programming language, "return value" means the value that is returned by any sub-routine. All subroutines need not return values, sometimes return void (means nothing). Return values often indicate something about the completion of the task or result of an operation.

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Write a function so that the main() code below can be replaced by the simpler code that calls function MphAndMinutesToMiles(). O
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Answer:

The program to this question can be given as:

Program:

#include <iostream> //header file

using namespace std; //using namespace

double MphAndMinutesToMiles(double milesPerHour, double minutesTraveled) //defining method

{

return (minutesTraveled/ 60.0)*milesPerHour; //return value.

}

int main() //defining main method

{

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cout<<"Enter miles per hour :";  

cin >> milesPerHour;  

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cin >> minutesTraveled;

cout << "Miles: "<< MphAndMinutesToMiles(milesPerHour, minutesTraveled)<< endl;

return 0;

}

Output:

Enter miles per hour :12

Enter travelling minutes :20

Miles: 4

Explanation:

The explanation of the above C++ program can be given as:

  • In the first header file is include the function is define that is "MphAndMinutesToMiles". This function accepts two parameters that are "milesPerHour and minutesTraveled".
  • Both parameter datatype is double and the function return type is also double. Inside a function calculate miles and return its value.
  • In the main method, two variable defines that takes value from the user side and pass into the function. To print function return value we use "cout" function that prints function return value.
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Answer:

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Answer:

Answer is in the attached screenshot.

Explanation:

Using regex to split a given input string via whitespace, then returns the first and last element of the array.

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