C++ Menu Driven Program with Area, Perimeter and Volume

 #include<iostream>

#define pi 3.14

using namespace std;

int main()

{

int ch,ch1;

float r,l,b,w,h,s,a,s1,s2,area,peri,vol;

system("cls");

cout<<"===========================================\n";

cout<<"\tMenu Of Programs | Nested Switch\n";

cout<<"===========================================\n";

cout<<"1. Area Programs\n";

cout<<"2. Perimeter programs\n";

cout<<"3. Volume Programs\n";

cout<<"Enter your Choice    :";

cin>>ch;

switch(ch)

{

case 1:

system("cls");

cout<<"===========================================\n";

cout<<"\t\tMenu of Area Programs\n";

cout<<"===========================================\n";

cout<<"1.Circle\n";

cout<<"2.Rectangle\n";

cout<<"3.Square\n";

cout<<"4.Triangle\n";

cout<<"Enter Your choice   :";

cin>>ch1;

switch(ch1)

{

case 1:

cout<<"===================================\n";

cout<<"\t\tArea Of Circle  :\n";

cout<<"===================================\n";

cout<<"Enter Radius OF circle  :";

cin>>r;

area=pi*r*r;

cout<<"Are Of Circle with "<<r<<" Radius is "<<area<<endl;

break;

case 2:

cout<<"===================================\n";

cout<<"\t\tArea Of Rectangle\n";

cout<<"===================================\n";

cout<<"Enter Length Of Rectangle :";

cin>>l;

cout<<"Enter the breadth Of Rectangle :";

cin>>b;

area=l*b;

cout<<"The Area Of Rectangle with Length "

<<l<<", And breadth "<<b<<" is "<<area<<endl;

break;

case 3:

cout<<"===================================\n";

cout<<"\t\tArea of Square\n";

cout<<"===================================\n";

cout<<"Enter Side of square  :";

cin>>s;

area=s*s;

cout<<"The Area of Square with "<<s<<" side is "

<<area<<endl;

break;

case 4:

cout<<"===================================\n";

cout<<"\t\tArea Of Triangle\n";

cout<<"===================================\n";

cout<<"Enter the Base Of Triangle :";

cin>>b;

cout<<"Enter the Height Of Triangle";

cin>>h;

area=0.5*b*h;

cout<<"The Area of Triangle With Base "<<b<<" And " 

<<"Height "<<h<<" Is "<<area<<endl;

break ;

default:

cout<<"Invalid Choice!!!\n";

break;

}

break;

case 2:

system("cls");

cout<<"===================================\n";

cout<<"\tMenu Of Perimeter Programs\n";

cout<<"===================================\n";

cout<<"1. Circle\n";

cout<<"2. Square\n";

cout<<"3. Rectangle\n";

cout<<"4. Triangle\n";

cout<<"Enter Your Choice  :";

cin>>ch1;

switch(ch1)

{

case 1:

cout<<"\n===================================\n";

cout<<"Perimeter Of Circle";

cout<<"\n===================================\n";

cout<<"Enter Radius OF Circle :";

cin>>r;

peri=2*pi*r;

cout<<"The Circumferance of Circle with Radius "

<<r<<" Is "<<peri<<endl;

break;

case 2:

cout<<"===================================\n";

cout<<"\t Perimeter of Rectangle ";

cout<<"===================================\n";

cout<<"Enter Side Of Square :  ";

cin>>s;

peri=s*4;

cout<<"The Perimeter OF Square with "<<s<<" Side is"

<<peri<<endl;

break;

case 4:

cout<<"===================================\n";

cout<<"Perimeter Of Triangle";

cout<<"===================================\n";

cout<<"Enter Base Of Triangle :";

cin>>b;

cout<<"Enter The Side 1 Of Triangle :";

cin>>s1;

cout<<"Enter The Side 2 Of Triangle :";

cin>>s2;

peri=s1+s2+b;

cout<<"The Perimeter Of Triangle with "

<<b<<" base,\n"<<s1<<" Side 1 and "

<<s2<<"Side 2 is "<<peri<<endl;

break;

default:

cout<<"Invalid Choice!!!\n";

break;

}

break;

case 3:

system("cls");

cout<<"===================================\n";

cout<<"\t\tMenu Of Volume Programs\n";

cout<<"===================================\n";

cout<<"1. Sphere\n";

cout<<"2. Cuboid\n";

cout<<"3. Cube\n";

cout<<"4. Triangular Pyramid\n";

cout<<"Enter Your Choice :";

cin>>ch1;

switch(ch1)

{

case 1:

cout<<"\n===================================\n";

cout<<"\t\tVolume Of Cuboid";

cout<<"===================================\n";

cout<<"Enter Radius Of Sphere :";

cin>>r;

vol=4.0/3.0*pi*r*r*r;

cout<<"The Volume of Sphere With Radius "

<<r<<" Is "<<vol<<endl;

break;

case 2:

cout<<"\n===================================\n";

cout<<"\t\tVolume Of Cuboid";

cout<<"\n===================================\n";

cout<<"Enter Length Of Rectangle  :";

cin>>l;

cout<<"Enter Width Of Rectangle  :";

cin>>w;

cout<<"Enter Height Of Rectangle  :";

cin>>h;

vol=l*w*h;

cout<<"The Volume Of Rectangle With "

<<l<<" Length ,\n"<<w<<" Width and "

<<h<<", and Height is "<<vol<<endl;

break;

case 3:

cout<<"\n===================================\n";

cout<<"\t\tVolume Of Cube";

cout<<"\n===================================\n";

cout<<"Enter side Of Cube";

cin>>s;

vol=s*3;

cout<<"The Volume of Cube With "

<<s<<" Side is "<<vol<<endl;

break;

case 4:

cout<<"===================================\n";

cout<<"\t\tVolume Of Triangular Pyramid";

cout<<"===================================\n";

cout<<"Enter The Apothem Length  :";

cin>>a;

cout<<"Enter THe Side Length  :";

cin>>s;

cout<<"Enter the Height  :";

cin>>h;

vol=a*s*h/6;

cout<<"The Volume of Triangle with "

<<a<<" Apothem Length, \n"

<<s<<" Side Length and "

<<h<<" Height Is "<<vol<<endl;

break;

default :

cout<<"Invalid Choice !!!\n";

break;

}

break;

}

return 0;

}