python基础：条件循环字符串

while True:
    a = int(input('摄氏转华氏请按 1\n华氏转摄氏请按 2:\n'))
    if a == 1:
        c = float(input('输入摄氏度温度: '))
        f = c*9/5+32
        print('{:.2f}摄氏温度转化为华氏温度为{:.2f}'.format(c,f))
    elif a == 2:
        f = float(input('输入华氏温度: '))
        c = 5/9*(f-32)
        print('{:.2f}华氏温度转换为摄氏温度为：{:.2f}\n'.format(f,c))
    else:
        break
while True:
    a = int