Program mencari luas bangun datar

Program Mencari Luas Bangun Datar

#include <iostream.h>

#include <conio.h>

void main ()

{

            const float phi=3.14;

            char ya;

            float  s, r, a, t, sj1, sj2, d1, d2, luas;

            int kode, jari_jari;

            atas :

            clrscr();

            cout<<".:: PROGRAM MENGHITUNG LUAS BANGUN DATAR ::."<<endl;

            cout<<"1.  BUJUR SANGKAR"<<endl;

            cout<<"2.  LINGKARAN "<<endl;

            cout<<"3.  SEGITIGA "<<endl;

            cout<<"4.  TRAPESIUM"<<endl;

            cout<<"5.  JAJAR GENJANG"<<endl;

            cout<<"6.  BELAH KETUPAT"<<endl;

            cout<<"7.  LAYANG-LAYANG"<<endl;

            cout<<"Masukkan kode bangun: ";

            cin>>kode;

            switch (kode)

            {

                        case 1:

                                    cout<<" Mencari luas "<<endl;

                                    cout<<" Masukkan nilai sisi : ";cin>>s;

                                    luas = s*s;

                                    cout<<"Luas bujur sangkar : "<<luas<<endl;

                        case 2:

                                    cout<<" Mencari luas lingkaran "<<endl;

                                    cout<<" Masukkan nilai jari-jari : ";cin>>jari_jari;

                                    if (jari_jari % 7 == 0)

                                     {

                                                luas=jari_jari*jari_jari*22/7;

                                     }

                                    else

                                    {

                                                luas=jari_jari*jari_jari*phi;

                                     }

                                    cout<<"Luas lingkaran : "<<luas<<endl;break;

                        case 3:

                                    cout<<" Mencari luas segitiga "<<endl;

                                    cout<<" Masukkan nilai alas   : ";cin>>a;

                                    cout<<" Masukkan nilai tinggi : ";cin>>t;

                                    luas=a*t/2;

                                    cout<<"Luas segitiga : "<<luas<<endl;break;

                        case 4:

                                    cout<<" Mencari luas trapesium "<<endl;

                                    cout<<" Masukkan nilai sisi sejajar 1 : ";cin>>sj1;

                                    cout<<" Masukkan nilai sisi sejajar 2 : ";cin>>sj2;

                                    cout<<" Masukkan nilai tinggi:  ";cin>>t;

                                    luas=(sj1+sj2)*t/2;

                                    cout<<"Luas trapesium : "<<luas<<endl;break;

                        case 5:

                                    cout<<" Mencari luas jajar genjang "<<endl;

                                    cout<<" Masukkan nilai alas : ";cin>>a;

                                    cout<<" Masukkan nilai tinggi : ";cin>>t;

                                    luas=a*t;

                                    cout<<"Luas jajar genjang : "<<luas<<endl;break;

                        case 6:

                                    cout<<" Mencari luas belah ketupat "<<endl;

                                    cout<<" Masukkan nilai d1 : ";cin>>d1;

                                    cout<<" Masukkan nilai d2 : ";cin>>d2;

                                    luas =d1*d2/2;

                                    cout<<"Luas belah ketupat : "<<luas<<endl;break;

                        case 7:

                                    cout<<" Mencari luas layang-layang "<<endl;

                                    cout<<" Masukkan nilai d1 : ";cin>>d1;

                                    cout<<" Masukkan nilai d2 : ";cin>>d2;

                                    luas =d1*d2/2;

                                    cout<<"Luas layang-layang : "<<luas<<endl;break;

            }

            getch ();

            kembali :

   clrscr();

            cout<<"Apakah Anda ingin kembali ke menu awal[y/t] : ";cin>>ya;

                        if (ya == 'y' || ya== 'Y')

                                    goto atas;

                        if (ya != 't' && ya != 'T')

                                    goto kembali ;

                        cout<<" Terima kasih telah menggunakan program ini.. ... (^_^) ";

}