kasus -kasus
6.1
#include <iostream>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
using namespace std;
class HitungRATA {
friend ostream& operator<<(ostream&, HitungRATA&);
friend istream& operator>>(istream&, HitungRATA&);
public:
float rata();
private:
int n;
int A[20];
};
istream& operator>>(istream& in, HitungRATA& a) {
cout << "Banyaknya data : ";
in >> a.n;
for (int i = 0; i < a.n; i++) {
cout << "Masukkan data ke- : " << i+1 << " > ";
cin >> a.A[i];
}
return in;
}
float HitungRATA::rata() {
float total=0;
for (int i = 0; i<n; i++) total = total + A[i];
return(total/n);
}
ostream& operator<<(ostream& out, HitungRATA& a) {
cout << "Rata-rata dari " << a.n;
cout << " bilangan adalah : "<< a.rata();
return out;
}
main() {
HitungRATA run;
cin >> run;
cout << run;
return 0;
}
6.2
#include <iostream>
#include <math.h>
#include <conio.h>
using namespace std;
class HitungStatistik {
friend ostream& operator<<(ostream&, HitungStatistik&);
friend istream& operator>>(istream&, HitungStatistik&);
public:
float rata();
float STD();
private:
long sqrt(int n) { return(n*n); }
int n;
int A[20];
};
istream& operator>>(istream& in, HitungStatistik& a)
{
cout << "Banyaknya data : ";
cin >> a.n;
for (int i = 0; i < a.n; i++)
{
cout << "Masukkan data ke- : " << i+1 << " > ";
cin >> a.A[i];
}
return in;
}
float HitungStatistik::rata()
{
float total=0;
for (int i = 0; i<n; i++) total = total + A[i];
return(total/n);
}
float HitungStatistik::STD ()
{ float rerata = rata();
float jumlah=0.0;
for (int i = 0; i<n; i++)
jumlah = jumlah + sqrt(A[i] - rerata);
return(sqrt (jumlah/(n-1)));
}
ostream& operator<<(ostream& out, HitungStatistik& a) {
cout << "Rata-rata dari " << a.n;
cout<< " bilangan adalah : " << a.rata() << endl;
cout << "Standar deviasi= " << a.STD();
return out;
}
Main() {
HitungStatistik run;
cin >> run;
cout << run;
return 0;
}
6.3
#include <iostream>
#include <math.h>
using namespace std;
class HitungStatistik {
friend ostream& operator<<(ostream&, HitungStatistik&);
friend istream& operator>>(istream&, HitungStatistik&);
public:
int maksimum();
private:
int maksimum2(int, int);
int n;
int A[20];
};
istream& operator>>(istream& in, HitungStatistik& a)
{
cout << "Banyaknya data : ";
cin >> a.n;
for (int i = 0; i < a.n; i++)
{
cout << "Data ke- : " << i+1 << " > ";
cin >> a.A[i];
}
return in;
}
int HitungStatistik::maksimum2(int a, int b)
{ if (a>b) return(a);
else return(b);
}
int HitungStatistik::maksimum()
{ int temp = A[0];
for (int i = 1; i<n; i++)
temp = maksimum2(temp, A[i]);
return(temp);
}
ostream& operator<<(ostream& out, HitungStatistik& a) {
cout << "Nilai terbesar: " << a.maksimum();
return out;
}
main() {
HitungStatistik run;
cin >> run;
cout << run;
return 0;
}
6.4
#include <iostream>
#include <math.h>
using namespace std;
class HitungStatistik {
friend ostream& operator<<(ostream&, HitungStatistik&);
friend istream& operator>>(istream&, HitungStatistik&);
public:
void maks_min();
private:
int m1, m2;
int n;
int A[20];
};
istream& operator>>(istream& in, HitungStatistik& a)
{
cout << "Banyaknya data : ";
cin >> a.n;
for (int i = 0; i < a.n; i++)
{
cout << "Data ke- : " << i+1 << " > ";
cin >> a.A[i];
}
return in;
}
void HitungStatistik::maks_min()
{ m1 = m2 = A[0];
for (int i=1; i<n; i++)
{
if (A[i] > m1) m1 = A[i];
if (A[i] < m2) m2 = A[i];
}
}
ostream& operator<<(ostream& out, HitungStatistik& a) {
a.maks_min();
cout << "Nilai terbesar : " << a.m1 << endl;
cout << "Nilai terkecil : " << a.m2;
return out;
}
main() {
HitungStatistik run;
cin >> run;
cout << run;
return 0;
}
6.5
#include <iostream>
#include <math.h>
using namespace std;
class HitungStatistik {
friend ostream& operator<<(ostream&, HitungStatistik&);
friend istream& operator>>(istream&, HitungStatistik&);
public:
HitungStatistik();
void hitung_modus();
private:
void maksimum();
void frekuensi();
int maks, item;
int n;
int A[20];
int f[11];
};
HitungStatistik::HitungStatistik()
{ for (int i=0; i<20; i++) f[i] = 0; }
istream& operator>>(istream& in, HitungStatistik& a) {
cout << "Banyaknya data : ";
cin >> a.n;
for (int i = 0; i < a.n; i++) {
cout << "Data ke- : " << i+1 << " > ";
cin >> a.A[i];
}
return in;
}
void HitungStatistik::maksimum()
{
maks = f[0];
item = 1;
for (int i=0; i<n; i++)
if (f[i] > maks) {
maks = f[i];
item = i;
}
cout << "Modus = " << item;
}
void HitungStatistik::frekuensi()
{
for (int i=1; i<n; i++) ++f[A[i]];
}
void HitungStatistik::hitung_modus() {
cout << "Frekuensi running\n";
frekuensi();
maksimum();
}
ostream& operator<<(ostream& out, HitungStatistik& a) {
cout << "Mulai ...\n";
a.hitung_modus();
cout << "Nilai modus : " << a.item;
return out;
}
main() {
HitungStatistik run;
cin >> run;
cout << run;
return 0;
}
6.6
#include <iostream>
#include <string.h>
#include <conio.h>
using namespace std;
class Palindrom {
friend ostream& operator<<(ostream&, Palindrom&);
friend istream& operator>>(istream&, Palindrom&);
public:
int cek_palindrom();
private:
char *s;
};
ostream& operator<<(ostream& out, Palindrom& a) {
if (a.cek_palindrom())
cout << a.s << " adalah palindrom";
else out << a.s << " bukan palindrom";
return out;
};
istream& operator>>(istream& in, Palindrom& a) {
cout << "Masukkan sebuah kalimat : ";
cin >> a.s;
return in;
};
int Palindrom::cek_palindrom()
{ int i, pj;
pj = strlen(s);
for (i=0; i<=pj/2 ;i++)
if (s[i] != s[pj-i-1]) return 0;
return 1;
}
main() {
Palindrom kata;
cin >> kata;
cout << kata;
getch();
return 0;
}
6.7
#include <iostream>
#include <conio.h>
#include <cstdlib>
#include <string.h>
using namespace std;
class Sandi {
friend ostream& operator<<(ostream&, Sandi&);
public:
Sandi() { kalimat = "Algoritma dan Pemrograman";}
void enkripsi(char *);
void dekripsi(int *);
private:
char *kalimat;
int *kalimatTersandi; };
void Sandi::enkripsi(char *kalimat) {
for (int i=0; kalimat[i] != '\0'; i++)
if (kalimat[i] != ' ')
if ( kalimat[i]%2==0 ) kalimatTersandi[i] = kalimat[i] + 3;
else kalimatTersandi[i] = kalimat[i] + 5;
else kalimatTersandi[i] = 0;
}
void Sandi::dekripsi(int *kalimatTersandi) {
for (int i=0; kalimat[i] != '\0'; i++)
if (kalimatTersandi[i] != 0)
if ( kalimat[i]%2==1 ) kalimat[i] = kalimatTersandi[i] - 5;
else kalimat[i] = kalimatTersandi[i] - 3;
else kalimat[i] = ' ';
}
ostream& operator<<(ostream& out, Sandi& snd) {
cout << "Kata Asli : " << snd.kalimat;
snd.enkripsi(snd.kalimat);
cout << "\nSetelah disandikan : ";
for (int i=0; i<=strlen(snd.kalimat); i++)
out << snd.kalimatTersandi[i] << " ";
snd.dekripsi(snd.kalimatTersandi);
cout << "\nSetelah dikembalikan : " << snd.kalimat;
return out;
}
int main() {
Sandi X;
cout << X;
}
work shop bab 7
soal1
#include <iostream>
#include <string.h>
#include <cstdlib>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
using namespace std;
int main(int argc, char** argv)
{
string a,b;int c;
cout<<"kalimat pertama : ";
getline(cin, a);
cout<<"kalimat kedua : ";
cin>>b;
cout<<a<<endl;
cout<<"Menyisipkan kata pada karakter ke : ";cin>>c;
a.insert(c, b+" ");
cout<<a;
return 0;
}
soal2
#include <iostream>
#include <string.h>
#include <conio.h>
using namespace std;
int main()
{
int i,jum;
char string[100];
cout<<"Masukan sembarang kalimat:\n";
cin.getline(string,100); //membaca spasi
//mengubah huruf awal menjadi huruf kapital
if((string[0]>='a')&& (string[0]<='z'))
string[0]=(char)string[0]-32;
//mengubah huruf setelah huruf awal menjadi huruf kecil
jum=1;int d=0;
for(i=0;i<(int)strlen(string);i++)
{
if(i%2==0){
if((string[jum]>='A')&& (string[jum]<='Z'))
string[jum]=(char)string[jum]+32;
jum++;}
}
//mengubah huruf setelah spasi menjadi huruf kapital
for(i=1;string[i]!='\0';i++)
{
if(string[i]==' ') d++;
if((i-1-d)%2==0)
{
if(string[i+1]>='a' && string[i+1]<='z')
string[i+1]=(char)(string[i+1]-32);
}
}
cout<<"Hasil Akhir : "<<string<<endl;
getch();
}
soal3
#include<stdio.h>
#include<iostream>
#include<ctype.h>
using namespace std;
int main()
{
char kalimat[100];
int i, spasi=0;
cout << "\n\t\t - Program Menghitung Kata Dalam Sebuah Kalimat -\n";
cout << "\t==================================================================\n\n";
cout << "\t Masukan Sebuah Kalimat : ";
cin.getline(kalimat, sizeof(kalimat));
for(i=0; kalimat[i]; i++)
{
if(isspace (kalimat[i]) || ispunct (kalimat[i]))
{
spasi++;
}
}
cout << "\t Jumlah Kata = " << spasi +1 << "\n\n";
cout << "\t Kata yang anda masukan adalah : \n";
cout << "\t ";
for(i=0; kalimat[i]; i++)
{
if(isspace (kalimat[i]) || ispunct (kalimat[i]))
{
spasi++;
cout << "\n";
cout << "\t";
}
cout << kalimat[i];
}
cout << "\n";
cout << "\t==================================================================\n\n";
cout << "\n";
getchar();
}
soal4
#include <iostream>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
using namespace std;
class Vektor {
friend ostream& operator<<(ostream&, Vektor&);
friend istream& operator>>(istream&, Vektor&);
friend class SPL;
public:
Vektor();
void penjumlahan_vektor(const Vektor& A, const Vektor& B);
void perkalian_vektor(float k, const Vektor& A);
void beri_nilaiBanyak(int);
private:
int elemen[100];
int banyak; };
int main(int argc, char** argv) {
return 0;
}
latihan bab 7
2.
#include <iostream>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
using namespace std;
int main(int argc, char** argv) {
string a;
cout<<"Masukkan Kalimat : ";getline(cin,a);
cout<<a<<endl;
cout<<"Panjang Karakter : "<<a.size();
return 0;
}
3.
#include <iostream>
#include <string.h>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
using namespace std;
int main(int argc, char** argv)
{
string a;
cout<<"masukkan kalimat : ";
getline(cin,a);
int b = a.length();
cout<<"dalam bentuk kapital : ";
for(int c=0;c<=b;c++)
{
a[c]=toupper(a[c]);
cout<<a[c];
}
cout<<endl;
cout<<"dalam bentuk huruf kecil : ";
for(int d=0;d<=b;d++)
{
a[d]=tolower(a[d]);
cout<<a[d];
}
cout<<endl;
return 0;
}
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