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Genrish500 [490]
4 years ago
7

Write a loop that prints each country's population in country_pop. Sample output with input:

Computers and Technology
1 answer:
Nostrana [21]4 years ago
4 0

Answer:

  1. country_pop = {
  2.    'China': 1365830000,
  3.    'India': 1247220000,
  4.    'United States': 318463000,  
  5.    'Indonesia': 252164800
  6. }  
  7. for key in country_pop:
  8.    print(key + " has " + str(country_pop[key]) + " people")

Explanation:

The solution code is written in Python 3.

Given a dictionary, country_pop with data that includes four country along with their respective population (Line 1-6). We can use for in loop structure to traverse through each of the key (country) in the dictionary and print their respective population value (Line 7-8). The general loop structure through is as follow:

                    for key in dict:

                         do something

One key will be addressed for each round of loop and we can use that key to extract the corresponding value of the key (e.g. country_pop[key]) and print it out.

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When should else be used in programming?
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Explanation:

The else statement is usually used when computations are still required when a condition is not met in an if and else-if statement, so the correct option is the fourth one: "to describe what should happen when the condition of an if statement isn't met".

Hope this helps :)

7 0
3 years ago
Read 2 more answers
You will write a program that reads a binary file that contains records of creatures. Each record can be stored in a Creature st
yuradex [85]

Answer:

Explanation:

main.cpp file

/******************************

Name

Date

PA1_Starter.cpp

Description

********************************/

// Headers

#include <iostream>

#include <cstdlib>

#include <string>

#include <vector>

#include <fstream>

#include <algorithm>

using namespace std;

// Global variables

const int CREATURE_NAME_SIZE = 30; // Max length of a creature name

const int CREATURE_TYPE_SIZE = 26; // Max length of a creature type

const string FILENAME = "creatures.dat"; // Name of file that contains the data

// struct used to create records in file

struct Creature

{

char name[CREATURE_NAME_SIZE]; // Name of the creature

char creatureType[CREATURE_TYPE_SIZE]; // Type of creature

int hp; // Hit points for creature

int armor; // Armor class for creature

int speed; // Speed of creature

};

// This function returns true if the name of the left creature is less than the name of the right creature

// Use this function when running the sort function

bool sortByName(const Creature &lhs, const Creature &rhs)

{

string name1(lhs.name), name2(rhs.name);

return name1 < name2;

}

// Function declarations

// You will need to code the definitions for each of these functions

int getCreatureNumber(int numCreatures);

void displayCreature(fstream& file, int num);

void displaySorted(fstream& file);

int main()

{

char choice; // choice made by user for menu

fstream creatureFile; // file stream for input file

int numCreatures; // the number of creatures saved to the file

 

// Open the creatureFile for input and binary (one statement of code)

 

// Get the number of creatures in the file (two statements of code)

// The number of creatures should be assigned to numCreatures

do

{

cout << "Menu" << endl;

cout << "1. Display a specific creature\n";

cout << "2. Display all creatures sorted by name\n";

cout << "3. Quit\n";

cout << "Enter your choice (1, 2, 3): ";

cin >> choice;

while (cin.get() != '\n');

switch (choice)

{

case '1': // Display a specific creature

displayCreature(creatureFile, getCreatureNumber(numCreatures));

break;

case '2': // Display all the creatures in order

displaySorted(creatureFile);

break;

case '3': // Quit

break;

default:

cout << "Invalid option.\n";

break;

}

if (choice != '3')

{

system("PAUSE");

system("CLS");

}

} while (choice != '3');

creatureFile.close();

 

 

// Make sure we place the end message on a new line

cout << endl;

// The following is system dependent. It will only work on Windows

system("PAUSE");

/*

// A non-system dependent method is below

cout << "Press any key to continue";

cin.get();

*/

return 0;

}

/*******************************************************************

getCreatureNumber gets and returns the record number from the file that the user would like to be displayed

PARAM: numCreatures should be the value of the total number of records (creatures) in the file

PRE: numCreatures contains a value that is equal to the number of records in the file

POST: A value between 1 and numCreatures is returned as selected by the user

NOTE: Do not allow a value less than 1 or greater than numCreatures to be returned

********************************************************************/

int getCreatureNumber(int numCreatures)

{

 

}

/*******************************************************************

displayCreature displays record number num from file

PARAM: file is a fstream that should be open for input and binary

num contains the record number that is to be read in file

PRE: file is a fstream that is open for input and binary

num is a value between 1 and the number of records in file

POST: The record number num is displayed to the monitor

********************************************************************/

void displayCreature(fstream& file, int num)

{

 

}

/*******************************************************************

displaySorted should read file into a vector. It should then sort the vector by

the name of the creature. Last it should display the vector

PARAM: file is a fstream that should be open for input and binary

PRE: file is open for input and binary

POST: Each record is displayed sorted by the name of the creature

********************************************************************/

void displaySorted(fstream& file)

{

 

}

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3 years ago
Add the ends to the relations on the Crows Foot ERD for the business rules of the XYZ Company's motor pool (a motor pool typical
Ierofanga [76]

The answer & explanation for this question is given in the attachment below.

8 0
3 years ago
Assume that two classes 'Temperature' and 'Sensor' have been defined. 'Temperature' has a constructor that accepts a double para
Black_prince [1.1K]

Answer:

The answer for the following question is given as:

public static Temperature create(Sensor ob)

{

return new Temperature(ob.getReading());

}

Explanation:

In this we have create a static method of  Temperature class which accept a 'Sensor' object and  return the new 'Temperature' object that calls the 'getReading()' function This function returns the sensor's current reading.

7 0
4 years ago
design a combinational circuit for a BCD to seven segment code converter that will input a BCD number and output it on a seven s
Vlad [161]

Answer:

See explaination

See explaination

Explanation:

Binary coded decimal:

Binary coded decimal (BCD) is a system of writing numerals that assigns a four-digit binary code to each digit 0 through 9 in a decimal (base-10) numeral. The four-bit BCD code for any particular single base-10 digit is its representation in binary notation.

Go to attachment for the step by step solution.

5 0
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