int main(void)
{
const char * string={"Hello mu darling"};
//puts("Enter your string here:\n");
// gets(string);
printf("Your string :\n%s",string);
int symbol = 'l';
puts("\nwe are looking for symbol 'l'");
char * ach;
ach = myStrchr(string, symbol);
printf ("\nYour symbol is is on position # %d\n",ach-string+1);
}
int main()
{
char inputstr[99];
char findchr;
int index = 0;
printf("inputstr: "); scanf("%s", inputstr);
printf("찾는 문자 <chr> : "); scanf("\n%c", &findchr);
myStrchr(inputstr, findchr, &index);
if (index != -1)
{
printf("%c의 위치 : %d \n", findchr, index);
}
else
{
printf("%c의 위치 : 찾고자 하는 문자 '%c'가 존재하지 않습니다. \n", findchr, findchr);
}
}
char* myStrtok(char *str, char *delimiters){
static char *current, *next, *endStr;
/*Check if this is the first call for a string*/
if(str != NULL){
/*If so, compute the pointer to the position of
the '\0' character (string terminator) -> endPosition*/
endStr = str + myStrlen(str);
/*Set the next pointer to be returned and the
to be the beginning of the string*/
next = str;
/*Skip the charactern in the beginning of the string
which are delimiters*/
while(next < endStr && myStrchr(delimiters, *next))
next++;
/*If the end of the string was reached return NULL*/
if(next == endStr)
return NULL;
current = next;
}
else{
/*Return the NULL pointer if the string cannot be split anymore*/
if(current == endStr){
return NULL;
}
/*Get the next part of the string*/
current++;
/*Save the pointer to it to next*/
next = current;
}
/*While the end of the string hasn't been reached and a delimiter
hasn't been found keep iterating*/
while(*current){
/*If the current substring is valid (starts with a non-delimiter, ends
right before a delimiter)
Stop iterating*/
if(!myStrchr(delimiters, *next) && myStrchr(delimiters, *current))
break;
/*If next points to a delimiter,
skip to the following character*/
if(myStrchr(delimiters, *next)){
next = current;
}
current++;
}
/*Make the character at the current position a string terminator*/
*current = '\0';
/*Return the pointer to the next part of the string*/
/*CORNER CASE: current reached the end of the string, but
the character to which next is pointing is a delimiter
CORNER CASE: next reaches the string terminator*/
return myStrchr(delimiters, *next) || *next == '\0'? NULL : next;
}
