[已解决]S1E41课后题（宏定义问题）

焦糖橙子

1. 请补充下面代码，添加一个宏定义，让程序可以统计 COUNTS 参数的个数。
我用DEV有报错
D:\C语言程序设计与数据结构\S1E41\S1E41.cpp        [Error] expected ')' before 'Apple'
是说说我缺少括号？但是我看也没少啊。代码也是参考答案，为什么会这样啊？
代码如下：

1. #include <stdio.h>
   
2. 
   
3. #define ARGUMENTS(A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, ...) A11
   
4. #define COUNTS(...) ARGUMENTS(FISHC, ## __VA_ARGS__, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
   
5. 
   
6. int main(void)
   
7. {
   
8.         printf("COUNTS()有 %d 个参数。\n", COUNTS());
   
9.         printf("COUNTS(1, 2, 3)有 %d 个参数\n", COUNTS(1, 2, 3));
   
10.         printf("COUNTS("Apple", "Banana", "Cat", "Dog")有 %d 个参数\n", COUNTS("Apple", "Banana", "Cat", "Dog"));
    
11. 
    
12.         return 0;
    
13. }

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最佳答案

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万千只cnm

2021-8-7 11:14:26

1.    printf("COUNTS()有 %d 个参数。\n", COUNTS());
   
2.         printf("COUNTS(1, 2, 3)有 %d 个参数\n", COUNTS(1, 2, 3));
   
3.     printf("COUNTS(""Apple"", ""Banana"", ""Cat"", ""Dog"")有 %d 个参数\n",COUNTS("Apple", "Banana", "Cat", "Dog") );

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万千只cnm

1.    printf("COUNTS()有 %d 个参数。\n", COUNTS());
   
2.         printf("COUNTS(1, 2, 3)有 %d 个参数\n", COUNTS(1, 2, 3));
   
3.     printf("COUNTS(""Apple"", ""Banana"", ""Cat"", ""Dog"")有 %d 个参数\n",COUNTS("Apple", "Banana", "Cat", "Dog") );

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