char* strcpy(char* dest, const char *src)
{
char *temp = dest;
while(*src != '\0')
{
*dest = *src;
dest++;
src++;
}
*dest++ = '\0';
return temp;
}
char* strncpy(char *dest, const char *src, size_t n)
{
char *temp = dest;
while(*src != '\0' && n--)
{
*dest = *src;
dest++;
src++;
}
*dest++ = '\0';
return temp;
}
char *strcat(char* dest, const char* src)
{
char *temp = dest;
while (*dest)
dest++;
while(*src != '\0')
{
*dest = *src;
dest++;
src++;
}
*dest++ = '\0';
return temp;
}
int strcmp(const char* s1, const char* s2)
{
char res;
while (1)
{
res = *s1 - s2;
if(res != 0)
break;
}
return (int)res;
}
