menghitung luas 2 kerucut c++ "program modify 3(b)"

#include <iostream>
using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
class kerucut{
int la;
int ls;
public:
void luas_kerucut(int,int);
luas(){return(la+ls);
}
};
void kerucut::luas_kerucut(int x,int y){
la=x;
ls=y;
}
int main(int argc, char** argv) {
kerucut a,b;
int x,y;
cout<<"Luas alas: ";cin>>x;
cout<<"Luas selimut:";cin>>y;
a.luas_kerucut(x,y);
b.luas_kerucut(11,5);
cout<<"Luas Kerucut A: "<<a.luas()<<endl;
cout<<"Luas Kerucut B: "<<b.luas();
return 0;
}

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Menghitung luas persegi dengan c++ "tugas program modify 3(a) "

#include <iostream>
using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
class persegi{
public:
int s;
int luas(){return(s*s);
}
};
int main(int argc, char** argv) {
persegi x;
cout<<"masukan sisi: ";cin>>x.s;
cout<<"luas persegi: "<<x.luas();
return 0;
}

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Menghtiung volume balok C++ "program modify dua"

#include <iostream>
using namespace std;
class balok{
int p,l,t;
public:
void balook(int,int,int);
int hasil(void){
return(p*l*t)
;}
};
void balok::balook(int a,int b,int c){
p=a;
l=b;
t=c;
}

int main(){
balok blok, blk;
int s,n,l;
cout<<"Panjang: ";cin>>s;
cout<<"Lebar: ";cin>>n;
cout<<"Tinggi: ";cin>>l;
blok.balook(s,n,l);
blk.balook(4,3,2);
cout<<blok.hasil()<<endl;
cout<<blk.hasil();
}

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Menghitung luas jajar genjang C++ "program modify satu"

#include <iostream>
using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
class jajargenjang{
int a,t;
public:
void jajar(int a,int t);
int area(void){return(a*t);}
};
void jajargenjang::jajar(int x,int y){
a=x;
t=y;
}
int main(int argc, char** argv) {
jajargenjang rect;
int x,y;
cout<<"Masukkan alas : ";cin>>x;
cout<<"Masukkan tinggi : ";cin>>y;
rect.jajar(x,y);
cout<<"luas:"<<rect.area();
return 0;
}

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