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#include <iostream>
using namespace std;
void firstProgram()
{
int choice;
int time;
double amountOfDistance;
const double CarbonDioxide = 258; //meters per second
const double Air = 331.5; //meters per second
const double helium = 972; //meters per second
const double hydrogen = 1270; //meters per second
cout << "\t\tThe Speed of Sound in Gas \n";
cout << "Make a Selection \n\n";
cout << "1. CarbonDioxide \n";
cout << "2. Air \n";
cout << "3. helium \n";
cout << "4. hydrogen \n";
cout << "Select the Desired Number and press Enter: ";
cin >> choice;
cout << "Now enter the time(in seconds) it took for sound to travel: ";
cin >> time;
if (time == 0)
{
cout << " NEIN! Value must be greater than ZERO!\n ";
}
else if (choice >= 1 && choice <=4)
{
switch (choice)
{
case 1: amountOfDistance = time * CarbonDioxide;
break;
case 2: amountOfDistance = time * Air;
break;
case 3: amountOfDistance = time * helium;
break;
case 4: amountOfDistance = time * hydrogen;
}
cout << "The distance traveled is ";
cout << amountOfDistance;
cout << " meters" << endl;
return;
}
void secondProgram()
{
int choice;
int distance;
double amountOfTime;
const double Oxygen = 1100; //feet per second
const double Water = 4900; //feet per second
const double Steel = 16400; //feet per second
cout << "\t\tThe Speed of Sound in a Medium \n";
cout << "Select a Medium \n\n";
cout << "1. Air \n";
cout << "2. Water \n";
cout << "3. Steel \n";
cout << "Select a medium and press Return: ";
cin >> choice;
cout << "Now enter the distance (feet) you want the sound wave to travel, then press Return: ";
cin >> distance;
if (distance == 0)
{
cout << " NEIN! You must enter a value greater then zero! \n ";
}
else if (choice >= 1 && choice <=3)
{
switch (choice)
{
case 1: amountOfTime = distance / Oxygen;
break;
case 2: amountOfTime = distance / Water;
break;
case 3: amountOfTime = distance / Steel;
}
cout << "The time is takes for sound to travel in your selection is: ";
cout << amountOfTime;
cout << " seconds" << endl;
return;
}
void thirdProgram()
{
int x1,y1,x2,y2,rec1,rec2;
cout << "Enter the length of the first rectangle (in.):";
cin >> x1;
cout << "Enter the width of the first rectangle (in.):";
cin >> y1;
cout << "Enter the length of the second rectangle (in.):";
cin >> x2;
cout << "Enter the width of the second rectangle (in.):";
cin >> y2;
rec1 = x1*y1;
rec2 = x2*y2;
if (rec1>rec2) cout << "The first rectangle is larger than the second ";
if (rec1<rec2) cout << "The second rectangle is larger than the first ";
if (rec1==rec2) cout << "Both rectangles are equal in size ";
return;
}
void fourthProgram()
int getNumberEmployees();
int getNumberMissedDays();
double computeMean(int nbEmployees, int nbMissedDays);
double computeMean(int nbEmployees, int nbMissedDays)
{
return ((double)nbMissedDays / (double)nbEmployees );
}
int getNumberEmployees(){
int i;
cout << "Please enter the number of employees: ";
cin >> i;
return i;
}
int getNumberMissedDays(){
int i;
cout << "Please enter the number of missed days: ";
cin >> i;
return i;
}
int main()
{
int nbEmp = getNumberEmployees();
int nbDays = getNumberMissedDays();
double mean = computeMean(nbEmp , nbDays );
std::cout << "The average number of missed days is " << mean << std::endl;
return;
}
int main () {
int choice;
cout << "Lets make a choice.\n\n1: Approximate speed of sound in air, water, and steel.\n2: Approximate speed of sound at 0 degrees centigrade when traveling through carbon dioxide, air, helium, and hydrogen.\n3: Area of a rectangle. \n4: Average number of days a company’s employees are absent\n\nI want: ";
cin >> choice;
switch (choice) {
case 1:
firstProgram();
break;
case 2:
secondProgram();
break;
case 3:
thirdProgram();
break;
case 4:
fourthProgram();
break;
default:
cout << "\n\nLOL! wut.\n";
break;
}
return 0;
}
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