[已解决]为什么这个执行不出来呢

pionrrt

1. def cheese_and_crackers(cheese_count,boxes_of_crackers):
   
2.     print("You have %r cheeses!")%cheese_count
   
3.     print("You have %r boxes of crackers!")%boxes_of_crackers
   
4.     print("Man that's enough for a party!")
   
5.     print("Get a blanket.\n")
   
6.     print("We can just give the function numbers directly:")
   
7.    
   
8. cheese_and_crackers(20,30)

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最佳答案

月排行榜 / 总排行榜

isdkz

2023-6-12 17:07:31

代码执行错误是因为你的字符串格式化操作（%操作符）在打印语句外部进行。你应该将%操作符以及后续的变量放在括号内，这样就可以将字符串中的%r替换为变量的值。正确的代码应该如下：

1. def cheese_and_crackers(cheese_count, boxes_of_crackers):
   
2.     print("You have %r cheeses!" % cheese_count)
   
3.     print("You have %r boxes of crackers!" % boxes_of_crackers)
   
4.     print("Man that's enough for a party!")
   
5.     print("Get a blanket.\n")
   
6.     print("We can just give the function numbers directly:")
   
7. 
   
8. cheese_and_crackers(20, 30)
   

复制代码

另外，注意到在你的代码中，"We can just give the function numbers directly:"这句话应该在函数调用前打印，而不是在函数内部打印。如下所示：

1. def cheese_and_crackers(cheese_count, boxes_of_crackers):
   
2.     print("You have %r cheeses!" % cheese_count)
   
3.     print("You have %r boxes of crackers!" % boxes_of_crackers)
   
4.     print("Man that's enough for a party!")
   
5.     print("Get a blanket.\n")
   
6. 
   
7. print("We can just give the function numbers directly:")
   
8. cheese_and_crackers(20, 30)
   

复制代码

以上修改过后的代码应该可以正常运行了。

跳转到最佳答案楼层

isdkz

代码执行错误是因为你的字符串格式化操作（%操作符）在打印语句外部进行。你应该将%操作符以及后续的变量放在括号内，这样就可以将字符串中的%r替换为变量的值。正确的代码应该如下：

1. def cheese_and_crackers(cheese_count, boxes_of_crackers):
   
2.     print("You have %r cheeses!" % cheese_count)
   
3.     print("You have %r boxes of crackers!" % boxes_of_crackers)
   
4.     print("Man that's enough for a party!")
   
5.     print("Get a blanket.\n")
   
6.     print("We can just give the function numbers directly:")
   
7. 
   
8. cheese_and_crackers(20, 30)
   

复制代码

另外，注意到在你的代码中，"We can just give the function numbers directly:"这句话应该在函数调用前打印，而不是在函数内部打印。如下所示：

1. def cheese_and_crackers(cheese_count, boxes_of_crackers):
   
2.     print("You have %r cheeses!" % cheese_count)
   
3.     print("You have %r boxes of crackers!" % boxes_of_crackers)
   
4.     print("Man that's enough for a party!")
   
5.     print("Get a blanket.\n")
   
6. 
   
7. print("We can just give the function numbers directly:")
   
8. cheese_and_crackers(20, 30)
   

复制代码

以上修改过后的代码应该可以正常运行了。