laprak struct

#include <iostream>
#include <iomanip>
using namespace std;


int main(){

typedef struct{

    char nama[30];
    char dosen[30];
    char kode[30];
    int sks;
    char nilai;

}kuliah;

typedef struct{
    int nim;
    char nama[30];
    int ipk;
    int jumlah;
    int totalsks;
    double totalharkat;
    kuliah matkul[50];


}mahasiswa;


int x;
int jumlah;
int nilai;
char alfabet;

cout<<"input jumlah mahasiswa : ";cin>>x;

mahasiswa mhs[x];



for(int i =0;i<x ;i++){
        cin.ignore();
    mhs[i].totalsks=0;
    cout<<"input mhs ke "<<i+1<<endl;
    cout<<"masukan nama : ";cin.getline(mhs[i].nama,30);
    cout<<"masukan nim  : ";cin>>mhs[i].nim;
    cout<<"masukan jumlah matkul  : ";cin>>jumlah;
    mhs[i].jumlah=jumlah;

    for(int j=0;j<jumlah;j++)
    {
        cin.ignore();
        cout<<"input matakuliah ke "<<j+1<<endl;
        cout<<"nama matkul : ";cin.getline(mhs[i].matkul[j].nama,30);
        cout<<"nama dosen  : ";cin.getline(mhs[i].matkul[j].dosen,30);
        cout<<"input sks   : ";cin>>mhs[i].matkul[j].sks;
        mhs[i].totalsks+=mhs[i].matkul[j].sks;
        cout<<"input kode  : ";cin>>mhs[i].matkul[j].kode;
        cout<<"input nilai : ";cin>>nilai;

        if(nilai<=100&&nilai>=80){
            alfabet ='A';
        }else
        {
            if(nilai<80&&nilai>=60){
            alfabet ='B';
        }
        else{

            if(nilai<60&&nilai>=40){
            alfabet ='C';
        }else{
        if(nilai<40&&nilai>=20){
            alfabet ='D';
        }
        else
        {
            alfabet = 'E';
        }
       }
      }
     }
        mhs[i].matkul[j].nilai = alfabet;
   }



  }


    for(int i=0;i<x;i++){
            mhs[i].totalharkat=0;
            for(int j=0;j<mhs[i].jumlah;i++){
                if(mhs[i].matkul[j].nilai=='A'){

                    mhs[i].totalharkat+=mhs[i].matkul[j].sks*4.0;

                }else{
                if(mhs[i].matkul[j].nilai=='B'){

                    mhs[i].totalharkat+=mhs[i].matkul[j].sks*3.0;


                }else{
                if(mhs[i].matkul[j].nilai=='C'){

                    mhs[i].totalharkat+=mhs[i].matkul[j].sks*2.0;

                }else{
                if(mhs[i].matkul[j].nilai=='D'){

                    mhs[i].totalharkat+=mhs[i].matkul[j].sks*1.0;

                }else{

                if(mhs[i].matkul[j].nilai=='E'){

                    mhs[i].totalharkat+=mhs[i].matkul[j].sks*0.0;

                }
              }
            }
          }
        }
      }
    }


    for(int i =0;i<x ;i++){
    cout<<endl;
    cout<<"mahasiswa ke "<<i+1<<endl;
    cout<<"nama : "<<mhs[i].nama<<endl;
    cout<<"nim  : "<<mhs[i].nim<<endl;
    cout<<"jumlah matkul  : "<<jumlah<<endl;
    cout<<"IPK            : "<<setprecision(3)<<mhs[i].totalharkat/mhs[i].totalsks<<endl;
    cout<<"------------------------------------------------------------"<<endl;
    cout<<"    NAMA    |     DOSEN    |    SKS    |   KODE    |  NILAI"<<endl;
    cout<<"------------------------------------------------------------"<<endl;

    for(int j=0;j<jumlah;j++)
    {

        cout<<setw(6)<<mhs[i].matkul[j].nama<<setw(15)<<mhs[i].matkul[j].dosen<<setw(12)<<mhs[i].matkul[j].sks<<setw(12);
        cout<<mhs[i].matkul[j].kode<<setw(12)<<mhs[i].matkul[j].nilai<<endl;

    }
    cout<<"------------------------------------------------------------"<<endl;

 }
}