This is C++ code.

Write a program called

all_area_semi.cpp that computes the area of an arbitrary

triangle. Use the following formula:

sqrt(s * (s - a)*(s - b)*(s - c))

where a, b and c are the lengths of the sides, and s is the semiperimeter.

s = (a + b + c) / 2

Include a void function call Compute that computes the area and perimeter of a

triangle based on the length of the sides. The function should use five parameters

three call by value parameters (a, b, c) that provide the lengths of the edges and

two cal

l by reference parameters (area, semiperimeter) that store

s

the computed

area and perimeter. Make your function robust. The function

Compute

should

be

called from your main program. Your must print the computed area and

semiperimeter rounded to the nea

rest hundredths.

In main you should declared the

necessary variables

,

and

include

a while

loop asking the user if he/she

would like

to continue computing area and semiperimeters.

Note that not all combinations of a, b, and c produce a triangle.

Remember,

the

sum of any two sides of a triangle must be greater than the third side. You must

make sure that the lengths of the sides of the triangle entered by the user are valid;

if not valid length

s

, you should let the use

r

know by printing a message stating th

at

the lengths

are invalid, and then prompt the user if he/she would like to continue

computing area and semiperimeters

.

Your function should produce correct results

for legal data and reasonable results for illegal combinations.

//include necessary libraries

#include

#include

#include

using namespace std;

//include function prototypes

void Input(int & a, int & b, int & c);

void Output(const int a, const int b, const int c, const double & area, const double & semiperimeter);

void Compute(const int a, const int b, const int c, double & area, double & semiperimeter);

//Function Definitions

void Input(int & a, int & b, int & c)

{

cout << "Please enter the three sides of the triangle: ";

cin >> a >> b >> c;

}

void Compute(const int a, const int b, const int c, double & area, double & semiperimeter)

{

//This function won't calculate the correct areas or perimeters.

double s;

s = (a + b + c) / 2;

area = sqrt(s * (s - a)*(s - b)*(s - c));

semiperimeter = s * 2;

}

void Output(const int a, const int b, const int c, const double & area, const double & semiperimeter)

{

cout << "The Area of the triangle is: " << area << endl;

cout << endl;

cout << "The Perimeter of the triangle is: " << semiperimeter;

}

int main()

{

string user_response = "y";

int a, b, c;

double area, semiperimeter;

cout << "******************************************************************" << endl;

cout << "" << endl;

cout << "~~~ Welcome to the Triangle Area and Perimeter Calculator! ~~~" << endl;

cout << "" << endl;

cout << "******************************************************************" << endl;

cout << "" << endl;

cout << "" << endl;

//while loop

while (user_response == "y" || user_response == "Y")

{

Input(a, b, c);

Compute(a, b, c, area, semiperimeter);

Output(a, b, c, area, semiperimeter);

cout << "" << endl;

cout << "Would you like to do another calculation (Y or N): " << endl;

cin >> user_response;

}

//end while loop

cout << "" << endl;

cout << "Thank you for using the Triangle Calculator!" << endl;

return 0;

}