/* C/C++ comments */

#include <stdio.h>

/* 12345 */
// 67890
   // "12345
   /** "67890
               **/
/**/

char *a = "xxxxx \" /* xxxxx */";  /* 12345 */
char *b = "// xxxxxx";  /* 67890 */
char c = 'x';  // 12345
char d = '\'';  /* 67890 */
char e = '/';  /* 12345 */

int main(void)
{
   return/*67890*/puts("[c] hello world") / 1;
}
/* 12345 */