Menghitung & Menampilkan Jumlah Deret Bilangan Sembarang

Contoh 1:
#include <iostream>
using namespace std;
void main(){
int n, bilangan, jumlah=0;
cout<<"Masukkan bilangan ke-Banyaknya Bilangan ";cin>>n;
for(int i=1;i<=n;i++)
{cout<<"Masukkan Bilangan ke- "<<i;cin>>bilangan;
jumlah=jumlah+bilangan;
}
cout<<"Jumlah Deret Bilangan = "<<jumlah;
system ("pause");
}

Contoh 2:
#include <iostream>
using namespace std;
void main(){
int n, npm, ipk;
float rataIPK, jumlah=0;
cout<<"Masukkan Banyaknya Bilangan ";cin>>n;
for(int i=1;i<=n;i++)
{cout<<"Masukkan NPM ke- "<<i<"  ";cin>>npm;
cout<<"Masukkan IPK ke- "<<i<"  ";cin>>ipk;
jumlah=jumlah+ipk;
}
rataIPK=jumlah/n;
cout<<"Rata-rata IPK  = "<<rataIPK;
system ("pause");
}

Contoh 3:
#include "iostream"
#include "string"
using namespace std;
void main(){
int n, npm[10] ;
float rataIPK, jumlah=0, ipk[10];
cout<<"Masukkan Banyaknya Bilangan ";cin>>n;
cout<<"============================\n";
for(int i=0;i<=n-1;i++)
{cout<<"Masukkan NPM ke- "<<i+1<<" = ";cin>>npm[i];
cout<<"Masukkan IPK ke- "<<i+1<<" = ";cin>>ipk[i];
cout<<"============================\n";
jumlah=jumlah+ipk[i];
}
cout<<"  >>>DATA NILAI IPK<<<  \n";
cout<<"NO    |    NPM    |    IPK  \n";
cout<<"============================\n";
 for(int i=0;i<=n-1;i++)
 cout<<i+1<<"           "<<npm[i]<<"           "<<ipk[i]<<endl;
rataIPK=jumlah/n;
cout<<"============================\n";
cout<<"Rata-rata IPK  = "<<rataIPK<<endl;
cout<<"============================\n";

system ("pause");
}

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