code of area of the triangle by using sides

This is the source code of area of the triangle by using sides
#include<iostream.h>
#include<conio.h>
#include<math.h>
 int main()
 {
     float a,b,c,S,Area;
     cout<<"enter the value of first side:";
     cin>>a;
       cout<<"enter the value of second side:";
       cin>>b;
         cout<<"enter the value of third side:";
         cin>>c;
         S=(a+b+c)/2;
         Area=sqrt(S*(S-a)*(S-b)*(S-c));
         cout<<"this is the required area:"<<Area;
         getch();
         }
End

C++ Program for conversion of Kg to g.

 This is the program for conversion of Kg to g.
// Program for conversion of Kg to g.
#include<iostream.h>
main()
{
      float kg,g;
      cout<<"Please Enter the value in Kg:";cin>>kg;
      cout<<"\n";
      g = kg / 1000;
      cout<<"The value of the g is:"<<g;
      cout<<"\n";
      system("Pause");
      }
End

source code of c++(checks for an even number)

The source code of c++(checks for an even number)

//  checks for an even number
#include <iostream>
using namespace std;

int main(){
   int num;
   cout << "Give me any number: ";
   cin >> num;

   if (num % 2 == 0) {
       cout << "It's even!" << endl;
   }else{
       cout << "It's odd!" << endl;
   }

  system("pause");
}
End

C++ source code for sum,pro,sub,mul,mod.

This is the C++ source code for sum,pro,sub,div,mod.



#include<iostream.h>
#include<conio.h>
 int main()
 {
     int x,y,sum,pro,sub,div,mod;
     x=10;
     y=5;
     sum=x+y;
     pro=x*y;
     sub=x-y;
     div=x/y;
     mod=x%y;
   
     cout<<"sum of x and y="<<sum<<endl;
     cout<<"pro of x and y="<<pro<<endl;
     cout<<"sub of x and y="<<sub<<endl;
     cout<<"div of x and y="<<div<<endl;
     cout<<"mod of x and y="<<mod<<endl;
     getch();
     }
   
End