p134 커피자판기 while if elif else break

coffee = 10
while True:
    money = int(input("돈넣어:"))
    if money ==300 :
        print("커피 나옴")
        coffee -=1
        print("남은커피 %d개" % coffee)
        
    elif money > 300 :
        print("거스름돈 : %d , 커피 나옴" %(money-300))
        coffee -=1
        print("남은커피 %d개" % coffee)

    else:
        print ("돈 돌려주고 커피안나옴")
        print ("남은커피 %d개" %coffee)

    if coffee ==0:
        print("남은커피 없음")
        break