Program menghitung luas dengan Dev c++

#include <cstdlib>

#include <iostream>

using namespace std;

int main(int argc, char *argv[])

{

    system ("color f0");    // digunkaan untuk menganti tampilan warna

    float bujursangkar, lingkaran, segitiga;

    float trapesium, luas;

    float sisi, jari, tinggi;

    float alas, atas;

    const float phi=3.14;

    char jwb;

    do

    {

    cout<<"/* ================================================= */"<<endl;

    cout<<"/*                       PROGRAM                            */"<<endl;

    cout<<"/*                   PENGHITUNG LUAS                        */"<<endl;

    cout<<"/*       BUJURSANGKAR, LINGKARAN, SEGITIGA, TRAPESIUM   */"<<endl;

    cout<<"/* ================================================   */"<<endl;

    cout<<endl<<endl;

    cout<<"/*                   LUAS YANG INGIN ANDA HITUNG            */"<<endl;

    cout<<endl<<endl;

    cout<<" 1. Luas bujursangkar "<<endl<<endl;

    cout<<" 2. Luas lingkaran    "<<endl<<endl;

    cout<<" 3. Luas segitiga     "<<endl<<endl;

    cout<<" 4. Luas Trapesium    "<<endl<<endl;

   

    cout<<" Pilihlah Luas Yang ingin anda hitung [ 1 - 4 ] "  ;cin>>luas;

    cout<<endl<<endl;

   

    if (luas==1)

    {

     cout<<"/* ================================================ */"<<endl;

     cout<<"                    Luas Bujursangkar                      "<<endl;

     cout<<"/* ================================================ */"<<endl;

     cout<<endl;

     cout<<" MASUKKAN SISI SISINYA = ";cin>>sisi;

     bujursangkar = sisi*sisi;

     cout<<endl;

     cout<<" Luas Bujur sangkar "<<bujursangkar<<" m2 "<<endl;

     cout<<endl;

     }

    else if (luas==2)

    {

     cout<<"/* ================================================ */"<<endl;

     cout<<"                      Luas Lingkaran   "<<endl;

     cout<<"/* ================================================ */"<<endl;

     cout<<endl;

     cout<<" MASUKKAN JARI - JARI = ";cin>>jari;

     lingkaran = phi*jari*jari;

     cout<<endl;

     cout<<" Luas Lingkaran  = "<<lingkaran<<" m2 "<<endl;

     cout<<endl;

     }

    else if (luas==3)

    {

     cout<<"/* ================================================ */"<<endl;

     cout<<"                      Luas segitiga    "<<endl;

     cout<<"/* ================================================ */"<<endl;

     cout<<endl;

     cout<<" MASUKKAN ALAS   = ";cin>>alas;

     cout<<endl;

     cout<<" MASUKKAN TINGGI = ";cin>>tinggi;

     segitiga = 0.5*alas*tinggi;

     cout<<endl;

     cout<<" Luas Segitiga adalah "<<lingkaran<<" m2 "<<endl;

     cout<<endl;

     }

    else if (luas==4)

    {

     cout<<"/* ================================================ */"<<endl;

     cout<<"                    Luas trapesium  "<<endl;

     cout<<"/* ================================================ */"<<endl;

     cout<<endl;

     cout<<" MASUKKAN ALAS   = ";cin>>alas;

     cout<<endl; 

     cout<<" MASUKKAN ATAS   = ";cin>>atas;

     cout<<endl;

     cout<<" MASUKKAN TINGGI = ";cin>>tinggi;

     trapesium = ((alas + atas)*tinggi)/2;

     cout<<endl;

     cout<<" Luas Trapesium adalah "<<trapesium<<" m2 "<<endl;

     cout<<endl;

     }   

    cout<<""<<endl;

    cout<<"  TERIMAKASIH ANDA TELAH MENGGUNAKAN "<<endl;

    cout<<"             PROGRAM KAMI              "<<endl;

    cout<<""<<endl;

    cout<<" Kembali ke program penghitung luas [ Y/T] ";

    cin>> jwb;

}

     while (jwb=='Y' || jwb=='y');

    //system("PAUSE");

    return EXIT_SUCCESS;

}

Gambar hasil program penghitung luas :