#!/bin/bash
penjumlahan(){
	clear
	echo "=== Penjumlahan ==="
	read -p "Angka 1 : " a;
	read -p "Angka 2 : " b;
	hasil=$[a+b];
	echo "Hasil : " $hasil;
}
pengurangan(){
	clear
	echo "=== Pengurangan ==="
	read -p "Angka 1 : " a;
	read -p "Angka 2 : " b;
	hasil=$[a-b];
	echo "Hasil : " $hasil;
}
perkalian(){
	clear
	echo "=== Perkalian ==="
	read -p "Angka 1 : " a;
	read -p "Angka 2 : " b;
	hasil=$[a*b];
	echo "Hasil : " $hasil;
}
modulus(){
	clear
	echo "=== Modulus ==="
	read -p "Angka 1 : " a;
	read -p "Angka 2 : " b;
	hasil=$[a%b];
	echo "Hasil : " $hasil;
}
pembagian(){
	clear
	echo "=== Pembagian ==="
	read -p "Angka 1 : " a;
	read -p "Angka 2 : " b;
	hasil=$[a/b];
	echo "Hasil : " $hasil;
}
menu(){
	clear
	echo "PERHITUNGAN SEDERHANA"
	echo "1. Penjumlahan"
	echo "2. Pengurangan"
	echo "3. Perkalian"
	echo "4. Pembagian"
	echo "5. Modulus"
	echo "6. Exit"
	read -p "Pilihan anda [1-6] :" pil;
	while [ -z $pil ] || [ $pil -lt 1 ] || [ $pil -gt 6 ];
	do
	read -p "Pilihan anda [1-6] :" pil;
	done
}
#block utama
lagi='y'
while [ $lagi == 'y' ] || [ $lagi == 'Y' ]
do
menu;
case $pil in
1) penjumlahan
;;
2) pengurangan
;;
3) perkalian
;;
4) pembagian
;;
5) modulus
;;
6) clear;
exit 0;
;;
*)
echo "$pil, tidak ada dalam pilihan"
;;
esac
echo -n "Ke Menu (y/t): ";
read lagi;
done