#include
#include
#include
char *my_strchr(const char *dst, char c)
{
assert(dst);
const char *pdst = dst;
while (*pdst)
{
if (*pdst == c)
return (char *)pdst;
else
pdst++;
}
return NULL;
}
int main()
{
char c=0;
char arr[40]={0};
char * = NULL;
scanf("%c", &c);
scanf("%s", arr);
str=my_strchr(arr, c);
printf("%#p\n",*str);
system("pause");
return 0;
}
#include
#include
#include
char *my_strrchr(const char *src, char c)
{
assert(src);
const char *psrc = src;
char *dst = NULL;
while (*psrc)
{
if (*psrc == c)
dst =(char *) psrc;
psrc++;
}
return dst;
}
int main()
{
char c = 0;
char arr[40];
char *place = NULL;
scanf("%c%s", &c, arr);
place = my_strrchr(arr, c);
printf("%#p\n",place);
system("pause");
return 0;
}
//strrstr库里面没有
#include
#include
#include
char *my_strrstr(const char *dst, const char *src)
{
assert(dst);
assert(src);
const char *pdst = dst;
const char *psrc = src;
char *right= NULL;
while (*dst)
{
while (*pdst == *psrc)
{
if (*pdst== '\0')
return right=(char *)dst;
else
{
pdst++;
psrc++;
}
}
if (*psrc == '\0')
right = (char *)dst;
pdst = ++dst;
psrc = src;
}
return right;
}
int main()
{
char arr1[50] = { 0 };
char arr2[40] = { 0 };
char *place = NULL;
scanf("%s%s",arr1, arr2);
place = my_strrstr(arr1, arr2);
printf("%#p\n",place);
system("pause");
return 0;
}
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