去除C代码中的注释，

1. 单行注释//；

2. 多行注释/**/；

3. 单行注释以“\”结尾则下一行也为注释；

4. 字符串中的注释不处理。

说是C语言，但其实所有C语系的都可以，比如Java。

小工具：去除C语言注释

复制代码 代码如下:

#include

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

enum {

literal,

single,

multiple,

string

} mode = literal;

char last = 0, current;

while ((current = getchar()) != EOF) {

switch (mode) {

case single: {

if (last != '\\' && (current == '\n' || current == '\r')) {

putchar(current);

current = 0;

mode = literal;

}

} break;

case multiple: {

if (last == '*' && current == '/') {

current = 0;

mode = literal;

}

} break;

case string: {

if (last == '\\') {

putchar(last);

putchar(current);

} else if (current != '\\') {

putchar(current);

if (current == '"') {

mode = literal;

}

}

} break;

default: {

if (last == '/') {

if (current == '/') {

mode = single;

} else if (current == '*') {

mode = multiple;

} else {

putchar(last);

putchar(current);

}

} else if (current != '/') {

putchar(current);

if (current == '"') {

mode = string;

}

}

} break;

}

last = current;

}

return 0;

}

测试代码

复制代码 代码如下:

#include

#include

int main (int argc, char *argv[])

{

// not show\

not show\

not show

// not show

/* not show */

int is; // not show

int/* not show */ ms; /* not show */

double ds; // not show\

not show\

not show

double dm; /* ...

not show

not show */ float fs; /**

* now show

*/

float/**/ fm;

char cs[] = "aaa // /***/";

char cm1[] = /* not show */"hello*/";

char cm2[] = "/*redraiment"/* not show */;

/* printf("/"); */

return EXIT_SUCCESS;

}

处理后的代码

复制代码 代码如下:

#include

#include

int main (int argc, char *argv[])

{

int is;

int ms;

double ds;

double dm;  float fs;

float fm;

char cs[] = "aaa // /***/";

char cm1[] = "hello*/";

char cm2[] = "/*redraiment";

return EXIT_SUCCESS;

}