Question

keil中出现 错误C141：syntax error near'extern'

#ifndef __STRING_H__
#define __STRING_H__
#ifndef _SIZE_T
#define _SIZE_T
#endif
#ifndef NULL
#define NULL ((void *) 0L)
#endif typedef unsigned int size_t;
#pragma SAVE
#pragma REGPARMS
extern char *strcat (char *s1, char *s2);
extern char *strncat (char *s1, char *s2, int n);
extern char strcmp (char *s1, char *s2);
extern char strncmp (char *s1, char *s2, int n);
extern char *strcpy (char *s1, char *s2);
extern char *strncpy (char *s1, char *s2, int n);
extern int strlen (char *);
extern char *strchr (const char *s, char c);
extern int strpos (const char *s, char c);
extern char *strrchr (const char *s, char c);
extern int strrpos (const char *s, char c);
extern int strspn (char *s, char *set);
extern int strcspn (char *s, char *set);
extern char *strpbrk (char *s, char *set);
extern char *strrpbrk (char *s, char *set);
extern char *strstr (char *s, char *sub);
extern char *strtok (char *str, const char *set);
extern char memcmp (void *s1, void *s2, int n);
extern void *memcpy (void *s1, void *s2, int n);
extern void *memchr (void *s, char val, int n);
extern void *memccpy (void *s1, void *s2, char val, int n);
extern void *memmove (void *s1, void *s2, int n);
extern void *memset (void *s, char val, int n);
#pragma RESTORE
#endif

Answer 1

应该是这样的：
#ifndef __STRING_H__
#define __STRING_H__
#ifndef _SIZE_T
#define _SIZE_T
typedef unsigned int size_t;
#endif
#ifndef NULL
#define NULL ((void *) 0L)
#endif
。。。。。

追问

还是不行 这样改就变成 syntax error near 'typedef'

追答

这文件应该不需要自己写啊，KEIL本身就带的，你到其他电脑上拷一份就可以了。这种现象真还没碰到过。