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3 years ago

The ____ operator executes one of two expressions based on the results of a conditional expression. Group of answer choices

Computers and Technology

2 answers:

Mars2501 [29]3 years ago

8 0

Corrected or Complet Question

The ____ operator executes one of two expressions based on the results of a conditional expression.

a. .

b. ( )

c. ,

d. ?:

Answer:

(d) ? :

Explanation:

The ternary operator (? :) is an operator that executes one out of two expressions based on the results of a conditional expression. It is a faster or shorthand way of writing an if ... else statement. The operator checks the conditional expression and depending on whether it is true or false, one of its two statements will be executed. For example:

String correct = (4 < 5) ? "yes" : "no" ;

In the code above,

i. the conditional statement is (4 < 5) and this will be tested for to return true or false.

ii. the first expression (the one after the ?) is "yes" which will be executed if the conditional statement returns true.

iii. and the second expression (the one after the : ) is "no" which will be executed if the conditional statement returns false.

Therefore, since the conditional expression returns true for 4 < 5, the first expression will be executed. i.e "yes". This means that the String variable <em>correct </em> will have a value of "yes".

tia_tia [17]3 years ago

7 0

Answer:

Conditional operator ?:

Explanation:

The conditional operator evaluates a condition and chooses one of the two expressions which depends on whether the condition evaluated to true or false.

The syntax of conditional statement is given below:

conditional_expression ? expression1 : expression2;

Basically this operator takes three operands/expressions and if the first expression ( a conditional expression) evaluates to true then this means that the second expression is evaluated/executed and if the first expression evaluates to false then the third expression is evaluated.

Example:

int number = 16;

number%2 == 0 ? cout<<"even number" : cout<<"odd number";

This statement first checks the conditional expression number%2==0 is true or false.
Value of number variable is 16 and here % is the modulo operator which calculates the remainder after dividing one number by another.
So 16%2==0 because 16 is divisible by 2 and gives 8 as quotient and 0 as remainder.
So the conditional statement is true it means that the first expression will be executed.
Hence the output will be: even number

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4 years ago

C++ coding, help

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Answer:

The program in C++ is as follows:

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#include <iostream>

#include <iomanip>

using namespace std;

int main() {

string filename;

cout<<"Filename: ";

cin>>filename;

ifstream inFile(filename);

if(!inFile) {

cout << endl << "Cannot open file " << filename;

return 1; }

ofstream fout;

ifstream fin;

fin.open("invalid-numbers.txt");

fout.open ("invalid-numbers.txt",ios::app);

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double num = 0;

while(!inFile.eof()) {

inFile >> num;

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else{ invalid++;

if(fin.is_open()){

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fin.close();

fout.close();

inFile.close();

cout<<"Total values: "<<valid+invalid<<endl;

cout<<"Invalid values: "<<invalid<<endl;

cout<<"Valid values: "<<valid<<endl;

cout<<"Average of valid values: "<<fixed<<setprecision(2)<<sum/valid<<endl;

double inv;

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Explanation:

See attachment for source file where comments are used to explain each line

Download cpp

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3 years ago

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3 years ago

Read 2 more answers

In a particular factory, a team leader is an hourly paid production worker who leads a small team. In addition to hourly pay, te

Ray Of Light [21]

Answer:

#include <iostream>

#include <iomanip>

#include <string>

using namespace std;

class Employee

{

private:

string name; // Employee name

string number; // Employee number

string hireDate; // Hire date

public:

Employee()

{ name = ""; number = ""; hireDate = ""; }

Employee(string aName, string aNumber, string aDate)

{ name = aName; number = aNumber; hireDate = aDate; }

void setName(string n)

{ name = n; }

void setNumber(string num)

{ number = num; }

void setHireDate(string date)

{ hireDate = date; }

string getName() const

{ return name; }

string getNumber() const

{ return number; }

string getHireDate() const

{ return hireDate; }

};

class ProductionWorker : public Employee

{

private:

int shift; // The worker's shift

double payRate; // The worker's hourly pay rate

public:

ProductionWorker() : Employee()

{ shift = 0; payRate = 0.0; }

ProductionWorker(string aName, string aNumber, string aDate,

int aShift, double aPayRate) : Employee(aName, aNumber, aDate)

{ shift = aShift; payRate = aPayRate; }

void setShift(int s)

{ shift = s; }

void setPayRate(double r)

{ payRate = r; }

int getShiftNumber() const

{ return shift; }

string getShiftName() const

{ if (shift == 1)

return "Day";

else if (shift == 2)

return "Night";

else

return "Invalid";

}

double getPayRate() const

{ return payRate; }

};

class TeamLeader : public ProductionWorker

{

private:

double monthlyBonus; // Monthly bonus amount

double requiredTraining; // Required training hours

double completedTraining; // Completed training hours

public:

};

void displayInfo(ProductionWorker);

void displayInfo(TeamLeader);

int main()

{

ProductionWorker pw("John Jones", "123", "1/1/2006", 2, 18.00);

displayInfo(pw);

/* remove the comment to enable

TeamLeader leader("John Jones", "123", "1/1/2006", 2, 18.00,

500.0, 20.0, 12.5);

displayInfo(leader);

return 0;

}

void displayInfo(ProductionWorker e)

{

cout << setprecision(2) << fixed << showpoint;

cout << "Name: "

<< e.getName() << endl;

cout << "Employee number: "

<< e.getNumber() << endl;

cout << "Hire date: "

<< e.getHireDate() << endl;

cout << "Shift: "

<< e.getShiftName() << endl;

cout << "Shift number: "

<< e.getShiftNumber() << endl;

cout << "Pay rate: "

<< e.getPayRate() << endl;

}

void displayInfo(TeamLeader e)

{

/* enable this section to print

cout << setprecision(2) << fixed << showpoint;

cout << "Name: "

<< e.getName() << endl;

cout << "Employee number: "

<< e.getNumber() << endl;

cout << "Hire date: "

<< e.getHireDate() << endl;

cout << "Shift: "

<< e.getShiftName() << endl;

cout << "Shift number: "

<< e.getShiftNumber() << endl;

cout << "Pay rate: "

<< e.getPayRate() << endl;

cout << "Monthly bonus: $"

<< e.getMonthlyBonus() << endl;

cout << setprecision(1);

cout << "Required training hours: "

<< e.getRequiredTraining() << endl;

cout << "Completed training hours: "

<< e.getCompletedTraining() << endl;

}

Hope it helps.

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3 years ago

In comparing a multi-boot environment and an environment using a type II hypervisor which offers the best performance? Which wou

ElenaW [278]

Answer / Explanation

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While:

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4 years ago