1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
#include <stdio.h>
char *strncpy(char to[], const char from[], int till);
char *strncat(char to[], const char from[], int till);
int strncmp_sneed(const char str1[], const char str2[], int till);
int
main(void)
{
char str[10];
printf("%s\n", strncpy(str, "gnu linux", 3));
printf("%s\n", strncat(str, " linux", 6));
if (!strncmp_sneed("seed", "seed feed", 3))
printf("suckses\n");
return 0;
}
char *strncpy(char to[], const char from[], int till)
{
if (from[till] != '\0')
to[till+1] = '\0';
while (till--)
*(to+till) = *(from+till);
return to;
}
char *strncat(char to[], const char from[], int till)
{
char *to_og = to;
while (*to)
++to;
while (till--)
*(to+till) = *(from+till);
return to_og;
}
int
strncmp_sneed(const char str1[], const char str2[], int till)
{
int count;
for (count = 0, --till; count < till && *(str1+count) == *(str2+count); count++)
;
return *(str1+count) - *(str2+count);
}
|
