#include <stdlib.h>
#include <stdio.h>
#include <string.h>

void SringTrimStart(char *p, char *trim)
{
	char *q = p;
	do {
		if (strchr(trim, *q) == NULL)
			break;
		q++;
	} while(1);
	memmove(p, q, strlen(q) + 1);
}

void SringTrimEnd(char *p, char *trim)
{
	char *q;
	
	int len = strlen(p);
	if (len == 0)
		return;
	q = p + len - 1;
	do {
		if (strchr(trim, *q) == NULL)
			break;
		q--;
	} while(1);
	q++;
	*q = 0;
}

void StringTrim(char *p, char *trim)
{
	SringTrimStart(p, trim);
	SringTrimEnd(p, trim);
}

int main(void)
{
	char buf1[100];
	char buf2[100];
	char buf3[100];
	char cTarget[] = "ABCBA-1234-CBABC";
	char cTrims[] = "ABC";
	
	strcpy(buf1, cTarget);
	strcpy(buf2, cTarget);
	strcpy(buf3, cTarget);
	SringTrimStart(buf1, cTrims);
	SringTrimEnd(buf2, cTrims);
	StringTrim(buf3, cTrims);
	printf("%s\n", buf1);
	printf("%s\n", buf2);
	printf("%s\n", buf3);
	
	return 0;
}