C 为什么此多行宏不'；不行？_C_Macros

C 为什么此多行宏不'；不行？

c macros

C 为什么此多行宏不'；不行？,c,macros,C,Macros,看起来好像连包都没包好。但我觉得很好也许它不喜欢新台词？在没有他们的情况下尝试过也许它一定是大写的？我真的不知道也许它不喜欢///评论 #define fill(where_l, where_r, where_t, where_b, what_l, what_r, what_t, what_b) \ \ ////lt

看起来好像连包都没包好。但我觉得很好

也许它不喜欢新台词？在没有他们的情况下尝试过

也许它一定是大写的？我真的不知道

也许它不喜欢///评论

#define fill(where_l, where_r, where_t, where_b, what_l, what_r, what_t, what_b) \
                                                                    \
    ////lt                                      \
    *p++ = where_l;                   \  
    *p++ = where_t;                   \
    *p++ = 0.5f;                    \
    *p++ = 1.0f;                   \
    *p++ = what_l;                   \
    *p++ = what_t;                   \
                                    \
    ////rt                   \
    *p++ = where_r;                   \
    *p++ = where_t;                   \
    *p++ = 0.5f;                   \
    *p++ = 1.0f;                   \
    *p++ = what_r;                   \
    *p++ = what_t;                   \
                   \
    ////lb                   \
    *p++ = where_l;                   \
    *p++ = where_b;                   \
    *p++ = 0.5f;                   \
    *p++ = 1.0f;                   \
    *p++ = what_l;                   \
    *p++ = what_b;                   \
                   \
    ////rb                   \
    *p++ = where_r;                   \
    *p++ = where_b;                   \
    *p++ = 0.5f;                   \
    *p++ = 1.0f;                   \
    *p++ = what_r;                   \
    *p++ = what_b;                   \

错误：

1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(569) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(569) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(570) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(570) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(570) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(569) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(571) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(571) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(571) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(569) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(572) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(572) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(572) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(569) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(573) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(573) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(573) : error C2086: 'int *p' : redefinition

已完全删除评论，现在错误为：

1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(569) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(569) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(569) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(570) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(570) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(570) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(571) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(571) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(571) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(572) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(572) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(572) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(574) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(574) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(574) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(575) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(575) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(575) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(576) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(576) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(576) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(577) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(577) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(577) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(578) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(578) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(578) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(579) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(579) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(579) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(581) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(581) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(581) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(582) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(582) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(582) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(583) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(583) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(583) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(584) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(584) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(584) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(585) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(585) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(585) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(586) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(586) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(586) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(588) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(588) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(588) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(589) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(589) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(589) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(590) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(590) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(590) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(591) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(591) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(591) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(592) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(592) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(592) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(593) : error C2143: syntax error : missing ';' before '++'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(593) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(593) : error C2086: 'int *p' : redefinition
1>        c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(568) : see declaration of 'p'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(641) : error C2297: '*' : illegal, right operand has type 'float *'
1>c:\_src\directxsamples\ex_tut2_showjpg\tut2_vertices.cpp(641) : error C2017: illegal escape sequence

看起来你的帖子大部分是代码，请添加更多细节

以下是我如何使用它：

            float* p = (float*)malloc(999);
            fill(i_im_x, i_im_x + 512.0f,
                i_im_y, i_im_y + 512.0f,
                0.0f, 1.0f,
                0.0f, 1.0f);

您需要这样做：

将所有

///xx

注释替换为

/*xx*/

删除下一行中

后的多余空格字符：

这并不明显，因为除非将光标放在那里，否则无法看到该偏移空间

删除宏最后一行中的最后一个

：

工作示例：

#define fill(where_l, where_r, where_t, where_b, what_l, what_r, what_t, what_b) \
                                                                    \
    /*lt*/                                      \
    *p++ = where_l;                   \
    *p++ = where_t;                   \
    *p++ = 0.5f;                    \
    *p++ = 1.0f;                   \
    *p++ = what_l;                   \
    *p++ = what_t;                   \
    \
    /* rt */                  \
    *p++ = where_r;                   \
    *p++ = where_t;                   \
    *p++ = 0.5f;                   \
    *p++ = 1.0f;                   \
    *p++ = what_r;                   \
    *p++ = what_t;                   \
                   \
    /*lb*/                   \
    *p++ = where_l;                   \
    *p++ = where_b;                   \
    *p++ = 0.5f;                   \
    *p++ = 1.0f;                   \
    *p++ = what_l;                   \
    *p++ = what_b;                   \
                   \
    /*rb*/                   \
    *p++ = where_r;                   \
    *p++ = where_b;                   \
    *p++ = 0.5f;                   \
    *p++ = 1.0f;                   \
    *p++ = what_r;                   \
    *p++ = what_b;

int main(int argc, char **argv) {

  float* p = (float*)malloc(999);
  fill(1, 2, 3, 4, 5, 6, 7, 8)
}

my ide中的语法突出显示是错误的。如果曾经有一个宏应该是函数…将所有

///lt

替换为

/*lt*///code>，宏将正常。请说明如何使用填充宏，问题可能就在那里。请阅读：宏以“\”结尾，也就是说，接下来的任何内容都是宏的一部分。这非常有帮助。找到原因，在/之后有空格。
 *p++ = what_b;                   \
                                  ^ remove this

#define fill(where_l, where_r, where_t, where_b, what_l, what_r, what_t, what_b) \
                                                                    \
    /*lt*/                                      \
    *p++ = where_l;                   \
    *p++ = where_t;                   \
    *p++ = 0.5f;                    \
    *p++ = 1.0f;                   \
    *p++ = what_l;                   \
    *p++ = what_t;                   \
    \
    /* rt */                  \
    *p++ = where_r;                   \
    *p++ = where_t;                   \
    *p++ = 0.5f;                   \
    *p++ = 1.0f;                   \
    *p++ = what_r;                   \
    *p++ = what_t;                   \
                   \
    /*lb*/                   \
    *p++ = where_l;                   \
    *p++ = where_b;                   \
    *p++ = 0.5f;                   \
    *p++ = 1.0f;                   \
    *p++ = what_l;                   \
    *p++ = what_b;                   \
                   \
    /*rb*/                   \
    *p++ = where_r;                   \
    *p++ = where_b;                   \
    *p++ = 0.5f;                   \
    *p++ = 1.0f;                   \
    *p++ = what_r;                   \
    *p++ = what_b;

int main(int argc, char **argv) {

  float* p = (float*)malloc(999);
  fill(1, 2, 3, 4, 5, 6, 7, 8)
}