while True:
    a = int(input(‘攝氏度轉換為華氏度請按1\n華氏度轉換為攝氏度請按2\n退出請按3\n‘))
    if a==1:
        c = float(input(‘請輸入攝氏度:‘))
        f = c*9/5+32
        print(‘攝氏{:.2f}的華氏度為{:.2f}‘.format(c,f))
    elif a==2:
        f = float(input(‘請輸入華氏度:‘))
        c = 5/9*(f-32)
        print(‘華氏{:.2f}的攝氏度為{:.2f}‘.format(f,c))
    
 
else:
        break

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