10-1. python 딕셔너리와 함수 결합

def add(n1, n2):
	return n1 + n2

def sub(n1, n2):
	return n1 - n2

def mul(n1, n2):
	return n1 * n2

def div(n1, n2):
	return n1 / n2

operations ={
	"+":add,
	"-":sub,
	"*":mul,
	"/":div
}

num1 = int(input("첫번째 수를 입력하세요 : "))
for o in operations:
	print(o)
operation_symbol = input("연산자를 입력하세요 : ")
num2 = int(input("두번째 수를 입력하세요 : "))
func = operations[operation_symbol]
answer = func(num1, num2)

print(f"{num1} {operation_symbol} {num2} = {answer}")