{

// when the case 1 in the main menu

for (int l = 0; l < 120; l++)

{

cout << "=";

}

cout << endl;

cout << "\t\t\t\t***Area of Geometrical figures.***\n";

for (int l = 0; l < 120; l++)

{

cout << "=";

}

cout << endl;

cout << " [1] Circle" << endl;

cout << " [2] Rectangle" << endl;

cout << " [3] Triangle" << endl;

cout << " [4] Square" << endl;

cout << " [5] EXIT to MAIN MENU" << endl;

cout << endl;

{

// when the case 2 in the main menu

for (int l = 0; l < 120; l++)

{

cout << "=";

}

cout << endl;

cout << "\t\t\t\t***Circumference of Geometrical figures.***\n";

for (int l = 0; l < 120; l++)

{

cout << "=";

}

cout << endl;

cout << " [1] Circle" << endl;

cout << " [2] Rectangle" << endl;

cout << " [3] Triangle" << endl;

cout << " [4] Square" << endl;

cout << " [5] EXIT to MAIN MENU" << endl;

cout << endl;

{

// when the case 3 in the main menu

for (int l = 0; l < 120; l++)

{

cout << "=";

}

cout << endl;

cout << "\t\t\t\t***Find the Largest number among 3 numbers.***\n";

for (int l = 0; l < 120; l++)

{

cout << "=";

}

cout << endl;

{ // overloading function for finding the area of circle

double area1;

double input_radius;

area1 = 3.141592653589793238463 * pow(radius, 2);

cout << "The area of Circle: " << area1 << endl;

cout << endl;

return area1;

{ // overloading function for finding the area of rectengle

double area2;

area2 = sideA * sideB;

cout << "The area of Rectangle: " << area2 << endl;

cout << endl;

return area2;

{ // overloading function for finding the area of triangle

double area3, S;

S = (sidetriangleA + sidetriangleB + sidetriangleC) / 2;

area3 = sqrt(S * (S - sidetriangleA) * (S - sidetriangleB) * (S - sidetriangleC));

cout << "The area of triangle: " << area3 << endl;

cout << endl;

return area3;

{

float area4;

area4 = pow(sidesquare, 2);

cout << "The area of square: " << area4 << endl;

cout << endl;

return area4;

{

double circumference1;

double input_radius;

circumference1 = 2 * 3.141592653589793238463 * radius;

cout << "The circumference of Circle: " << circumference1 << endl;

cout << endl;

return circumference1;

{

double circumference2;

circumference2 = 2 * (sideA + sideB);

cout << "The circumference of Rectangle: " << circumference2 << endl;

cout << endl;

return circumference2;

{

double circumference3;

circumference3 = sidetriangleA + sidetriangleB + sidetriangleC;

cout << "The circumference of triangle: " << circumference3 << endl;

cout << endl;

return circumference3;

{

float circumference4;

circumference4 = 4 * sidesquare;

cout << "The circumference of square: " << circumference4 << endl;

cout << endl;

return circumference4;

{

if (n1 >= n2 && n1 >= n3)

{

cout << "Largest number: " << n1 << endl;

}

if (n2 >= n1 && n2 >= n3)

{

cout << "Largest number: " << n2 << endl;

}

if (n3 >= n1 && n3 >= n2)

{

cout << "Largest number: " << n3 << endl;

}

return n1, n2, n3;

{

if (n1 >= n2 && n1 >= n3)

{

cout << "Largest number: " << n1 << endl;

}

if (n2 >= n1 && n2 >= n3)

{

cout << "Largest number: " << n2 << endl;

}

if (n3 >= n1 && n3 >= n2)

{

cout << "Largest number: " << n3 << endl;

}

else if (n1 == n2 == n3)

cout << "Largest number : " << n3 << endl;

return n1, n2, n3;

{

if (n1 >= n2 && n1 >= n3)

{

cout << "Largest number: " << n1 << endl;

}

if (n2 >= n1 && n2 >= n3)

{

cout << "Largest number: " << n2 << endl;

}

if (n3 >= n1 && n3 >= n2)

{

cout << "Largest number: " << n3 << endl;

}

else if (n1 == n2 == n3)

cout << "Largest number : " << n3 << endl;

return n1, n2, n3;

{

system("color 3E");

int numberforoperation = 0;

double radius1;

double sideA, sideB;

double sidetriangleA, sidetriangleB, sidetriangleC;

float sidesquare;

double n1, n2, n3;

for (int l = 0; l < 120; l++)

{

cout << "=";

}

cout << endl;

cout << "\t\t\t\t\tHello! Welcome to the main menu.\n";

cout << "\t\t WARNING!!! Enter only numbers!!! And the 'y/n' when you will be asked!\n";

for (int l = 0; l < 120; l++)

{

cout << "=";

}

cout << endl;

cout << "\t[1] Area of Geometrical Figures.\n";

cout << "\t[2] Circumference of geometrical figures.\n";

cout << "\t[3] Find the largest number.\n";

cout << "\t[4] finding the largest number with function template.\n";

cout << "\t[5] EXIT\n";

cout << endl;

b:

cout << " Please enter the number of operation you would like to execute: ";

cin >> numberforoperation;

if (numberforoperation > 0 && numberforoperation < 6)

{

system("cls");

switch (numberforoperation)

{

case 1: // first11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

first();

int firstfirst;

f:

cout << " Choose one figure: ";

cin >> firstfirst;

if (firstfirst > 0 && firstfirst < 6)

{

system("cls"); // ends the main menu

switch (firstfirst) // firstfirst

{

system("cls"); // ends the main menu

case 1:

cout << "\t\t\t\t***CIRCLE***\n";

a:

cout << "Enter the radius of the circle: ";

cin >> radius1;

if (radius1 > 0)

{

area(radius1);

first();

goto f;

}

else

goto a;

break;

case 2:

cout << "\t\t\t\t***RECTANGLE***\n";

c:

cout << "Enter the height of rectangle: ";

cin >> sideA;

cout << "Enter the width of the rectangle: ";

cin >> sideB;

cout << endl;

if (sideA > 0 && sideB > 0)

{

area(sideA, sideB);

first();

goto f;

}

else

goto c;

break;

case 3:

cout << "\t\t\t\t***TRIANGLE***" << endl;

d:

cout << "Enter the first side of the triangle: ";

cin >> sidetriangleA;

cout << "Enter the second side of the triangle: ";

cin >> sidetriangleB;

cout << "Enter the third side of the triangle: ";

cin >> sidetriangleC;

cout << endl;

if (sidetriangleA > 0 && sidetriangleB > 0 && sidetriangleC > 0 && sidetriangleC < sidetriangleA + sidetriangleB && sidetriangleA < sidetriangleB + sidetriangleC && sidetriangleB < sidetriangleC + sidetriangleA)

{

area(sidetriangleA, sidetriangleB, sidetriangleC);

first();

goto f;

}

else

goto d;

break;

case 4:

cout << "\t\t\t\t***Square***" << endl;

e:

cout << "Enter the side of square: ";

cin >> sidesquare;

if (sidesquare > 0)

{

area(sidesquare);

first();

goto f;

}

else

goto e;

break;

case 5:

{

main();

break;

}

default:

break;

}

break;

}

else

goto f;

break;

case 2: // second2222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222

second();

int secondsecond;

g:

cout << " Choose one figure: ";

cin >> secondsecond;

if (secondsecond > 0 && secondsecond < 6)

{

system("cls"); // ends the main menu

switch (secondsecond) // firstfirst

{

system("cls"); // ends the main menu

case 1:

cout << "\t\t\t\t***CIRCLE***\n";

h:

cout << "Enter the radius of the circle: ";

cin >> radius1;

if (radius1 > 0)

{

circumference(radius1);

second();

goto g;

}

else

goto h;

break;

case 2:

cout << "\t\t\t\t***RECTANGLE***\n";

j:

cout << "Enter the height of rectangle: ";

cin >> sideA;

cout << "Enter the width of the rectangle: ";

cin >> sideB;

cout << endl;

if (sideA > 0 && sideB > 0)

{

circumference(sideA, sideB);

second();

goto g;

}

else

goto j;

break;

case 3:

cout << "\t\t\t\t***TRIANGLE***" << endl;

d1:

cout << "Enter the first side of the triangle: ";

cin >> sidetriangleA;

cout << "Enter the second side of the triangle: ";

cin >> sidetriangleB;

cout << "Enter the third side of the triangle: ";

cin >> sidetriangleC;

cout << endl;

if (sidetriangleA > 0 && sidetriangleB > 0 && sidetriangleC > 0 && sidetriangleC < sidetriangleA + sidetriangleB && sidetriangleA < sidetriangleB + sidetriangleC && sidetriangleB < sidetriangleC + sidetriangleA)

{

circumference(sidetriangleA, sidetriangleB, sidetriangleC);

second();

goto g;

}

else

goto d1;

break;

case 4:

cout << "\t\t\t\t***Square***" << endl;

e1:

cout << "Enter the side of square: ";

cin >> sidesquare;

if (sidesquare > 0)

{

circumference(sidesquare);

second();

goto g;

}

else

goto e1;

break;

case 5:

main();

break;

default:

break;

}

break;

}

else

goto g;

break;

///////////////////////////////////////////////////////////////////////////////////////////////////////////

case 3: // third333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333

third();

cout << "\t\t\tPlease enter 3 numbers to compare.\n\t\t\tYou can write even an integer or decimal number. For example: 123, 12.123, 0,123 \n";

x:

cout << endl;

cout << "Enter the first number: ";

cin >> n1;

cout << "Enter the second number: ";

cin >> n2;

cout << "Enter the third number: ";

cin >> n3;

findlargest(n1, n2, n3);

char quit;

cout << "Do you want to try again(y/n)? ";

if (cin >> quit && quit == 'y') // when user will input 'y' the code will again ask you to input a 3 numbers

goto x; // when it will be 'n' the code will go to the main menu

else

{

system("cls");

main();

}

break;

/////////////////////////////////////////////////////////////////////////////////////////////////////////////

case 4: // four4444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444

third();

cout << "\t\t\tPlease enter 3 numbers to compare.\n\t\t\tYou can write even an integer or decimal number. For example: 123, 12.123, 0,123 \n";

qw:

cout << endl;

cout << "Enter the first number: ";

cin >> n1;

cout << "Enter the second number: ";

cin >> n2;

cout << "Enter the third number: ";

cin >> n3;

findlargest(n1, n2, n3);

char quit2;

cout << "Do you want to try again(y/n)? "; // when user will input 'y' the code will again ask you to input a 3 numbers

if (cin >> quit2 && quit2 == 'y') // when it will be 'n' the code will go to the main menu

goto qw;

else

{

system("cls");

main();

}

break; // breaking the case 4 of the main menu

default:

break; // breaking the default

}

}

else

goto b;

system("pause");

return 0;