Berikut adalah Kodingan dari Integrasi Numerik,,
akan lebih bagus jika ada tampilan outputnya,, namun untuk sementara ini saja dulu
akan lebih bagus jika ada tampilan outputnya,, namun untuk sementara ini saja dulu
#include <iostream.h>
#include <conio.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
float f(float xo)
{
float fx;
fx=pow(xo,3)-(3*xo)+2;
return fx;
}
int pil1()
{
float btsa,btsb,h,fxo,fx1,fx2,fx3,n,i,sum,Deltafx;
cout<<"Soal Latihan No. 1 \n";
cout<<"===================================\n";
cout<<"Input Nilai Batas Atas (b) : ";cin>>btsa;
cout<<"Input Nilai Batas Bawah (a) : ";cin>>btsb;
cout<<"Input Nilai n : ";cin>>n;cout<<endl;
sum=f(btsb);
for(i=1;i<n;i++)
{
sum=sum+2*(f(btsb+(i*h)));
}
fxo=(h*(sum+f(btsa)))/2;
fx1=(pow(btsa,4)/4)-(3*(pow(btsa,2))/2)+(2*btsa);
fx2=(pow(btsb,4)/4)-(3*(pow(btsb,2))/2)+(2*btsb);
Deltafx=fx1-fx2;
fx3=Deltafx-fxo;
cout<<"1.Perhitungan Metode Numerik : "<<fxo<<"\n";
cout<<"2.Perhitungan Metode Analitik : "<<Deltafx<<"\n";
cout<<"3.Eror : "<<fabs(fx3);
cout<<endl;
getch();
}
int pil2()
{
float btsa,btsb,h,fxo,fx1,fx2,fx3,n,i,sum,Deltafx;
cout<<"Soal Latihan No. 2 \n";
cout<<"===================================\n";
cout<<"Input Nilai Batas Atas (b) : ";cin>>btsa;
cout<<"Input Nilai Batas Bawah (a) : ";cin>>btsb;
cout<<"Input Nilai n : ";
cin>>n;cout<<endl;
h=(btsa-btsb)/n;
sum=f(btsb);
for(i=1;i<n;i++)
{
sum=sum+2*(f(btsb+(i*h)));
}
fxo=(h*(sum+f(btsa)))/2;
fx1=(2.79487*btsa) + (0.312151*pow(btsa,2))/2;
fx2=(2.79487*btsb) + (0.312151*pow(btsb,2))/2;
Deltafx=fx1-fx2;
fx3=Deltafx-fxo;
printf("1.Perhitungan Metode Numerik : %.4f\n",fxo);
//cout<<"1.Perhitungan Metode Numerik : "<<fxo<<"\n";
printf("2.Perhitungan Metode Analitik : %.4f\n",Deltafx);
// cout<<"2.Perhitungan Metode Analitik : "<<Deltafx<<"\n";
printf("3. Error : %.4f",fabs(fx3));
// cout<<"3.Eror : "<<fabs(fx3);
cout<<endl;
getch();
}
int main()
{
int angka;
char huruf;
awal:
cout<<"MENU INTEGRASI NUMERIK (Modul Pert. 10) :\n";
cout<<"METODE TRAPESIUM\n\n";
cout<<"=============================================\n";
cout<<"1. Soal No. 1\n";
cout<<"2. Soal No. 2\n";
cout<<"3. KELUAR\n";
cout<<"Silahkan Input Pilihan Anda [1-3] : ";
cin>>angka;
if (angka==1)
{
pil1();cout<<"\n";
goto awal;
}
else if (angka==2)
{
pil2();
cout<<"\n";
goto awal;
}
else {
cout<<"Anda Yakin Akan Keluar Dari Program ? [Y/T] : ";
cin>>huruf;cout<<endl;
if (huruf=='Y' || huruf=='y')
{
cout<<"Semoga Bermanfaat dan Terima Kasih... (^_^)";
exit(0);}
else if (huruf=='T' || huruf=='t')
{cout<<"\n";
goto awal;}
}
getch();
}
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