刚学python，老师教的小代码报错，请大神指正

Question

总是提示SyntaxError: invalid character in identifier代码如下：#TempConvery.pyval = input(“请输入带温度提斯符号的温度值”)if val[-1] in ['c','c']    f = 1.8 * float(val[0:-1]) + 32 print(“转后后的温度为: %.2fF”%f)elif val[-1] in ['F','f']:    c = (float(val[0:-1]) - 32) / 1.8 print(“转后后的温度为：%.2fc%c”)else:    print(“输入有误”)