while True:
try:
weight = float(input("Please input your weight (kg): "))
height = float(input("Please input your height (cm): "))
# 合理範圍檢查
if weight < 40 or weight > 1000:
print("Invalid weight! Please enter a value between 40 and 1000 kg.\n")
continue
if height < 50 or height > 300:
print("Invalid height! Please enter a value between 50 and 300 cm.\n")
continue
except ValueError:
print("Invalid input! Please enter numbers only.\n")
continue
# 計算BMI
BMI = round(weight / ((height / 100) ** 2), 2)
# 判斷範圍
if BMI < 18.5:
print("Your BMI:", BMI, ", you are under-weighted!!!")
elif BMI >= 18.5 and BMI < 23:
print("Your BMI:", BMI, ", you are in normal range!!!")
elif BMI >= 23 and BMI < 25:
print("Your BMI:", BMI, ", you are over-weighted")
else:
print("Your BMI:", BMI, ", you are obese")
# 是否繼續
while True:
choice = input("\nDo you want to calculate again? (Y/N): ").lower()
if choice in ["y", "yes"]:
break # 跳出內層迴圈，繼續外層 while True
elif choice in ["n", "no"]:
print("Program ended. Goodbye!")
exit() # 結束整個程式
else:
print("Invalid choice! Please enter Y or N.")
