* [] str=input("我的身高,我的體重: ") a=float(str[0:3]) b=float(str[4:]) c = b*100*100/(a*a) print(f"BMI指數為:{c:.2f} ") 我的身高,我的體重: 160,45 BMI指數為:17.58 a=int(input("a:")) b=int(input("b:")) print(f'{a} + {b} = {a+b}') print(f'{a} - {b} = {a-b}') print(f'{a} * {b} = {a*b}') print(f'{a} / {b} = {a/b:.1f}') a: 5 b: 2 5 + 2 = 7 5 - 2 = 3 5 * 2 = 10 5 / 2 = 2.5
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