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Anna11 [10]
2 years ago
14

Create an array w with values 0, 0.1, 0.2, . . . , 3. Write out w[:], w[:-2], w[::5], w[2:-2:6]. Convince yourself in each case

that you understand which elements of the array that are printed.
Computers and Technology
1 answer:
larisa86 [58]2 years ago
6 0

Answer:

w = [i/10.0 for i in range(0,31,1)]

w[:]  = [0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0]

w[:-2] = [0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8]

w[::5]= [0.0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0]

w[2:-2:6] = [0.2, 0.8, 1.4, 2.0, 2.6]

Explanation:

List slicing (as it is called in python programming language ) is the creation of list by defining  start, stop, and step parameters.

w = [i/10.0 for i in range(0,31,1)]

The line of code above create the list w with values 0, 0.1, 0.2, . . . , 3.

w[:]  = [0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0]

since start, stop, and step parameters are not defined, the output returns all the list elements.

w[:-2] = [0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8]

w[:-2] since  stop is -2, the output returns all the list elements from the beginning to just before the second to the last element.

w[::5]= [0.0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0]

w[::5] since  step is -2, the output returns  the list elements at index 0, 5, 10, 15, 20, 25,30

w[2:-2:6] = [0.2, 0.8, 1.4, 2.0, 2.6]

the output returns the list elements from the element at index 2  to just before the second to the last element, using step size of 6.

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Write a function called sum_scores. It should take four arguments, where each argument is the team's score for that quarter. It
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Answer:

Here is the Python program which has a function sum_scores:

def sum_scores(score1, score2, score3, score4):

   sum = score1 + score2 + score3 + score4

   print(sum)    

sum_scores(14,7,3,0)

Explanation:

  • Method sum_scores takes four arguments, score1, score2, score3, score4.
  • The sum variable adds these four scores and stores the value of their addition.
  • Lastly print statement is used to print the value stored in sum variable which is the value obtained by adding the four scores.
  • Last statement calls the sum_scores method and passes four values to it which are 14,7,3,0
  • The output of the above program is:
  • 24
  • If you want to use return statement instead of print statement you can replace print(sum) with return sum. But in order to display the sum of the scores you can replace sum_scores(14,7,3,0) with print(sum_scores(14,7,3,0))
  • The program along with the output is attached as a screenshot.

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2 years ago
The fractional_part function divides the numerator by the denominator, and returns just the fractional part (a number between 0
7nadin3 [17]

Answer:

part a

Explanation:

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2 years ago
What is the value of x after each of the following statements is encountered in a computer program, if x=1 before the statement
steposvetlana [31]

Answer:

x=2

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x=2

Explanation:

a)

This if statement if (1+2=3) checks if the addition of two numbers 1 and 2 is true. Here the addition of 1 and 2 is 3 which is true. So the condition becomes true.

Since the condition is true x:=x+1 statement is executed. This statement means that the value of x is incremented by 1.

The value of x was 1 before the if statement is reached. So x:=x+1 statement will add 1 to that value of x.

x:=x+1 means x=x+1 which is x=1+1 So x=2

Hence value of x is 2 (x=2) after the execution of x:=x+1

b)

In statement b the value of x will be 1 because both the mathematical operations in the if statement evaluate to false.

which means in b, x:=x+1 will not be executed and value of x remains unchanged i.e x=1

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5 0
2 years ago
Create a class Student and another called StudentClub. StudentClub should have the fields President, Vice-President, Secretary,
salantis [7]

Answer:

See explaination

Explanation:

StudentClub.h

#ifndef STUDENTCLUB_H_INCLUDED

#define STUDENTCLUB_H_INCLUDED

//#include <vector>

//class student

class Student

{

public:

std::string name;

Student(){}

Student(std::string name)

{

this->name=name;

}

};

//studentclub class

class StudentClub

{

Student* President=new Student();

Student* VicePresident=new Student();

Student* Secretary=new Student();

Student* Treasurer=new Student();

std::vector<Student> clubMember;

public:

StudentClub(Student* p, Student* v, Student* s, Student* t, std::vector<Student> m);

Student* get_president() const;

Student* get_vice_president() const;

Student* get_secretary() const;

Student* get_treasurer() const;

std::vector<Student> get_members() const;

void add_member(Student* s);

int number_members();

};

#endif // STUDENTCLUB_H_INCLUDED

StudentClub.cpp

#include <iostream>

#include <vector>

#include "StudentClub.h"

using namespace std;

//constructor with parameter

StudentClub::StudentClub(Student* p, Student* v, Student* s, Student* t, vector<Student> m)

{

President =p;

VicePresident=v;

this->Secretary =s;

this->Treasurer =t;

this->clubMember=m;

}

//return president

Student* StudentClub::get_president() const

{

return this->President;

}

//return vice president

Student* StudentClub::get_vice_president() const

{

return this->VicePresident;

}

//return secretary

Student* StudentClub::get_secretary() const

{

return this->Secretary;

}

//return treasurer

Student* StudentClub::get_treasurer() const

{

return this->Treasurer;

}

//return memeber

vector<Student> StudentClub::get_members() const

{

return clubMember;

}

//add member

void StudentClub::add_member(Student* s)

{

for(int i = 0; i < clubMember.size(); i++)

{

if(clubMember[i].name == s->name)

return ;

}

this->clubMember.push_back(*s);

}

//return memeber count

int StudentClub::number_members()

{

return clubMember.size();

}

main.cpp

#include <iostream>

#include <vector>

#include "StudentClub.h"

using namespace std;

int main()

{

//declarations

Student p,s,v,t,m;

//get names

cout<<"President: ";

cin>>p.name;

cout<<"VicePresident: ";

cin>>v.name;

cout<<"Secretary: ";

cin>>s.name;

cout<<"Treasurer: ";

cin>>t.name;

vector<Student> cl;

//get members

do{

cout<<"\nNew member (Q to quit): ";

cin>>m.name;

if(m.name!="Q")

cl.push_back(m);

}while(m.name!="Q");

//add to club

StudentClub club(&p,&v,&s,&t,cl);

club.add_member(&p);

club.add_member(&v);

club.add_member(&s);

club.add_member(&t);

//print details

cout<<"\n\nPresident: "<<club.get_president()->name;

cout<<"\nVicePresident: "<<club.get_vice_president()->name;

cout<<"\nSecretary: "<<club.get_secretary()->name;

cout<<"\nTreasurer: "<<club.get_treasurer()->name;

cout<<"\nTotal Members: "<<club.number_members();

return 0;

}

3 0
2 years ago
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ElenaW [278]

Answer:

a mobile app that only accepts wagers based on the user's location.

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