Aplikasi Rekap Nilai Menggunakan Array

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#include <iostream>

#include <iomanip>

using namespace std;

int main() {
int fisika[100],kimia[100],matematika[100],biologi[100];
float rata_siswa[100],rata_matkul[100],jumlah[100];
float jumlah_fisika,jumlah_biologi,jumlah_kimia,jumlah_matematika;
float rata_matematika,rata_fisika,rata_biologi,rata_kimia;
int memory_in,memory_out;
int banyak_data;
char nama[100][100];

cout<<"Masukan Banyaknya Data : ";
cin>>banyak_data;

for(memory_in=0;memory_in<banyak_data;memory_in++) {
	cout<<"---------------------------------------------------------------------\n";
	cout<<"Data KE - "<<memory_in+1<<endl;
	cout<<"---------------------------------------------------------------------\n";
	cout<<"Nama Lengkap : "; cin>>nama[memory_in];
	cout<<"Nilai Fisika : "; cin>>fisika[memory_in];
	cout<<"Nilai Matematika : "; cin>>matematika[memory_in];
	cout<<"Nilai Kimia : "; cin>>kimia[memory_in];
	cout<<"Nilai Biologi : "; cin>>biologi[memory_in];
	jumlah[memory_in] = fisika[memory_in]+matematika[memory_in]+biologi[memory_in]+kimia[memory_in];
	rata_siswa[memory_in] = jumlah[memory_in]/4;
	jumlah_fisika+=fisika[memory_in];
	jumlah_matematika+=matematika[memory_in];
	jumlah_biologi+=biologi[memory_in];
	jumlah_kimia+=kimia[memory_in];

	}
cout<<"-----------------------------------------------------------------------------------------\n";
cout<<setw(4)<<"No"<<setw(15)<<"Nama"<<setw(15)<<"Fisika"<<setw(20)<<"Matematika"<<setw(15)<<"Kimia"<<setw(15)<<"Biologi"<<endl;
cout<<"-----------------------------------------------------------------------------------------\n";

for(memory_out=0;memory_out<banyak_data;memory_out++) {
	int no = memory_out+1;
	cout<<setw(4)<<no<<setw(20)<<nama[memory_out]<<setw(7)<<fisika[memory_out]<<setw(18)<<matematika[memory_out]<<setw(18)<<kimia[memory_out]<<setw(14)<<biologi[memory_out]<<endl;
	cout<<"-----------------------------------------------------------------------------------------\n\n";
	}

cout<<"\nRata - Rata Tiap Mahasiwa :"<<endl;
for(int i=0;i<banyak_data;i++) {
	cout<<nama[i]<<" = "<<rata_siswa[i]<<endl;
}

rata_fisika=jumlah_fisika/banyak_data;
rata_matematika=jumlah_matematika/banyak_data;
rata_kimia=jumlah_kimia/banyak_data;
rata_biologi=jumlah_biologi/banyak_data;
cout<<"\nRata - Rata Mata Kuliah";
cout<<"\nFisika : "<<rata_fisika;
cout<<"\nMatematika : "<<rata_matematika;
cout<<"\nBiologi : "<<rata_biologi;
cout<<"\nKimia : "<<rata_kimia<<endl;
}