GOBLOGSAINS

#include <iostream.h>
#include <stdio.h>

int main()
{
float rata[4], jumlah, data[3];
   cout<<"No    "<<"Nama Mhs   " << "PROG-1   "<<"MAT-1   "<< "BIG-1"  <<endl ;
cout<<" 1    "<<" Ahmad     " << " 81      "<<" 90     "<< " 62  "  <<endl ;
cout<<" 2    "<<" Adang     " << " 50      "<<" 83     "<< " 87  "  <<endl ;
cout<<" 3    "<<" Dani      " << " 89      "<<" 55     "<< " 65  "  <<endl ;
cout<<" 4    "<<" Edi       " << " 77      "<<" 70     "<< " 92  "  <<endl ;
cout<<"-----------------------------------------"                   <<endl ;

    for(int a=0;a<4;a++)
{
jumlah=0;

cout << a+1 << ". " << endl;
cout << "Nilai PROG-1 : ";
cin  >>  data [0];
cout << "Nilai MAT-1  : ";
cin  >>  data [1];
cout << "Nilai BIG-1  : ";
cin  >>  data [2];

for (int i=0;i<3;i++) { jumlah = jumlah + data [i]; };

rata[a]=jumlah/3;
}

cout << endl;

cout << "No.Mhs   Rata-rata" << endl;
    cout << "------------------" << endl;
printf("1.        %0.2f \n", rata[0]);
    printf("2.        %0.2f \n", rata[1]);
printf("3.        %0.2f \n", rata[2]);
printf("4.        %0.2f \n", rata[3]);
cout << "------------------" << endl;

return 0;
}

#include <iostream.h>
#include <stdio.h>
#include <conio.h>
int main()
 {
int n;
int i;
char nama [25];
float rata, jumlah ;
int data[10];
jumlah = 0;
cout <<"Nama         : "; cin>>nama ;
printf("Jumlah nilai : ");
scanf("%i",&n );
for(i = 0; i < n; i++)
 {
        printf("Nilai ke-%i   : ", i + 1);
scanf("%i", &data[i]);
jumlah = jumlah + data[i];
 }
rata = jumlah / n;
cout<<"Total = "<<jumlah<<endl;
cout <<nama << "," ;
cout<<"Nilai Rata-rata Adalah = "<<rata<<endl;
getch();
 }

Mencari nilai determinan dan akar x1 , x2

#include "stdio.h"
#include "math.h"
using namespace std;
int main()
{
float a, b, c, D, X, X1, X2, XRiil, XImajiner;
printf("Perhitungan akar-akar persamaan aX2+bX+c=0\n");
printf("Masukkan nilai koefisien a, b, dan c:\n");
scanf("%f %f %f", &a, &b, &c);
D = b*b-4*a*c;
printf("Diskriminan = %g\n", D);
printf("Akar persamaan %gX2 + %gX + %g = 0 adalah:\n", a, b, c);
if (D > 0) {
X1 = (-b+sqrt(D))/(2*a);
X2 = (-b-sqrt(D))/(2*a);
printf("X1 = %g\n", X1);
printf("X2 = %g\n", X2);
}
else if (D == 0) {
X = -b/(2*a);
printf("X1 = X2 = %g\n", X);
}
else {
XRiil = -b/(2*a);
XImajiner = sqrt(-D)/(2*a);
printf("Akar imajiner:\n");
printf("X1 = %g+%g*i\n", XRiil, XImajiner);
printf("X2 = %g-%g*i\n", XRiil, XImajiner);
}
return 0;
}