prog.c:1:1: error: expected identifier or '(' before numeric constant
4#include <stdio.h>
^
prog.c:1:2: error: stray '#' in program
4#include <stdio.h>
^
In file included from prog.c:2:0:
/usr/include/string.h:43:8: error: unknown type name 'size_t'
size_t __n) __THROW __nonnull ((1, 2));
^~~~~~
/usr/include/string.h:46:56: error: unknown type name 'size_t'
extern void *memmove (void *__dest, const void *__src, size_t __n)
^~~~~~
/usr/include/string.h:62:42: error: unknown type name 'size_t'
extern void *memset (void *__s, int __c, size_t __n) __THROW __nonnull ((1));
^~~~~~
/usr/include/string.h:65:56: error: unknown type name 'size_t'
extern int memcmp (const void *__s1, const void *__s2, size_t __n)
^~~~~~
/usr/include/string.h:92:48: error: unknown type name 'size_t'
extern void *memchr (const void *__s, int __c, size_t __n)
^~~~~~
/usr/include/string.h:129:39: error: unknown type name 'size_t'
const char *__restrict __src, size_t __n)
^~~~~~
/usr/include/string.h:137:9: error: unknown type name 'size_t'
size_t __n) __THROW __nonnull ((1, 2));
^~~~~~
/usr/include/string.h:143:57: error: unknown type name 'size_t'
extern int strncmp (const char *__s1, const char *__s2, size_t __n)
^~~~~~
/usr/include/string.h:150:8: error: unknown type name 'size_t'
extern size_t strxfrm (char *__restrict __dest,
^~~~~~
/usr/include/string.h:151:40: error: unknown type name 'size_t'
const char *__restrict __src, size_t __n)
^~~~~~
/usr/include/string.h:280:8: error: unknown type name 'size_t'
extern size_t strcspn (const char *__s, const char *__reject)
^~~~~~
/usr/include/string.h:284:8: error: unknown type name 'size_t'
extern size_t strspn (const char *__s, const char *__accept)
^~~~~~
/usr/include/string.h:394:8: error: unknown type name 'size_t'
extern size_t strlen (const char *__s)
^~~~~~
/usr/include/string.h:446:33: error: unknown type name 'size_t'
extern void __bzero (void *__s, size_t __n) __THROW __nonnull ((1));
^~~~~~
prog.c: In function 'main':
prog.c:8:2: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
scanf("%d %c %d",&a,&c,&b);
^~~~~
prog.c:8:2: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:8:2: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:24:5: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
printf("Wrong input\n");
^~~~~~
prog.c:24:5: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:24:5: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:28:3: warning: incompatible implicit declaration of built-in function 'printf'
printf("%d",ans );
^~~~~~
prog.c:28:3: note: include '<stdio.h>' or provide a declaration of 'printf'