编写函数把华氏温度转换为摄氏温度，公式为：C = (F - 32)* 5/9 在主程序中提示用户输入一个华氏温度，转化后输出相应的摄氏温度。-Write a function to convert Fahrenheit to Celsius, the formula is: C = (F- 32)* 5/9 in the main program prompts the user for a Fahrenheit temperature, the transformed output of t