plug 2 kuy

#include <iostream>
#include <string.h>
using namespace std;
//bismillah

char nama[][100]={};
char barang[][100][30]={};
int total[100],harga[][100]={},jumlah[][100]={},bayar[100];

void segitigaNama();
bool prima(int);
void deretPrima();
void inputbarang(int);
void daftarpembelian(int);


int main()
{
    char y;
    int menu,x;
    do{
    cout<<"Menu"<<endl;
    cout<<"1. Segitiga Nama"<<endl;
    cout<<"2. Deret Prima"<<endl;
    cout<<"3. Input pembelian"<<endl;
    cout<<"4. Daftar Pembelian"<<endl;
    cout<<"5. exit"<<endl;
    cout<<"pilih : ";cin>>menu;

    switch(menu)
    {
        case 1:
            segitigaNama();
            cout<<"kembali ke menu utama? y/n : ";cin>>y;
        break;
        case 2:
            deretPrima();
            cout<<"kembali ke menu utama? y/n : ";cin>>y;
        break;
        case 3:
            cout<<"total pembeli : ";cin>>x;
            inputbarang(x);
            cout<<"kembali ke menu utama? y/n : ";cin>>y;
        break;
        case 4:
            daftarpembelian(x);
            cout<<"kembali ke menu utama? y/n : ";cin>>y;
        break;
        case 5:
            return 0;


    }

    }

    while(y=='y');


}


void segitigaNama()
{
    char nama[30];
    cin.ignore();
    cout<<"masukan nama : ";cin.getline(nama,30);
    int x = strlen(nama);
    for(int i=0;i<=x;i++)
    {
        for(int k=x-i;k>0;k--)
        {
            cout<<" ";
        }

        for(int j=0;j<i;j++)
        {
            cout<<nama[j]<<" ";

        }
        cout<<endl;

    }


}

bool prima(int x)
{   bool hasil;
    int num=0;
    for(int i=1;i<=x;i++)
    {
        if(x%i==0)
            num++;
        if(num>2)
        break;

    }

    num>2 ? hasil=false : hasil=true;

    return hasil;

}
void deretPrima(){
    int x;
    cout<<"masukan angka : "<<endl;cin>>x;
    for(int i=2;i<=x;i++)
    {
        if(prima(i))
        {
            cout<<i<<" ";
        }

    }
    cout<<endl;

}

void inputbarang(int x)
{
    for(int i=1;i<=x;i++)
    {

        cout<<"nama pembeli ke "<<i<<" : ";
        cin.ignore();
        cin.getline(nama[i],30);
        cout<<"jumlah barang yang dibeli : ";cin>>total[i];
        int beli=0;
        for(int j=1;j<=total[i];j++)
        {
            cout<<"nama barang ke "<<j<<" : ";
            cin.ignore();
            cin.getline(barang[i][j],30);
            cout<<"harga  : ";cin>>harga[i][j];
            cout<<"jumlah : ";cin>>jumlah[i][j];
            beli+=harga[i][j]*jumlah[i][j];;
        }
        bayar[i]=beli;
        cout<<"total pembelian orang ke"<<i<<" : "<<bayar[i]<<endl;
    }


}

void daftarpembelian(int x)
{

    for(int i=1;i<=x;i++)
    {

        cout<<"nama pembeli ke "<<i<<" : ";
        cout<<nama[i]<<endl;
        for(int j=1;j<=total[i];j++)
        {
            cout<<"nama barang ke "<<j<<" : ";
            cout<<barang[i][j]<<endl;
            cout<<"harga  : "<<harga[i][j]<<endl;
            cout<<"jumlah : "<<jumlah[i][j]<<endl;
        }
        cout<<"total pembelian orang ke"<<i<<" : "<<bayar[i]<<endl;
    }
    }


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