Contoh Program Perulangan Sederhana

#include<stdio.h>                                                           

#include<conio.h>

 main()

{

      int i,k;

      int a[20],b,c,d,e;

      float rata2;

      printf ("Masukkan batasan : ");

      scanf("%d",&k);

      b=0;c=0;d=1;

      printf("\n");

      for (i=1;i<=k;i++)

      {

          printf ("Masukkan nilai [%d]= ",i);

          scanf("%d",&a[i]);}

      for (i=1;i<=k;i++)

      {

          printf("\n");

          printf ("Nilai ke[%d]= %d\n",i,a[i]);}

      for(i=1;i<=k;i++)

      {b+=a[i];}

      for(i=1;i<=k;i++)

      {c=a[i]-c;}c*=-1;

      for(i=1;i<=k;i++)

      {d*=a[i];}

       e=(b/k);

      printf("\n");

      printf("\n");

      printf("Hasil penjumlahan  : %d\n",b);

      printf("Hasil pengurangan  : %d\n",c);

      printf("Hasil perkalian    : %d\n",d);

      printf("Hasil rata-rata    : %d",e);

      getch();

      return 0;

}