代码
#coding=utf-8 #中文#第6关：人民币美元汇率双向兑换计算number = input()result = 0astring = 'USD'bstring = 'CNY'#print ("numbur[3:]: ", number[3:])#print(number[0:3] == astring)if(number[0:3] == astring):b=float(number[3:]) #把字符串转为数字类型，重新赋值,#print(b)c = b * 7.0227#print(c)print('兑换成人民币是{:.2f}元'.format(c))elif(number[0:3] == bstring):b = float(number[3:]) # 把字符串转为数字类型，重新赋值,#print(b)c = b /7.0227#print(c)print('兑换成美元是{:.2f}元'.format(c))else:print("输入格式错误")
