消除字符串中重复字符，并统计消除重复元素的个数。如输入abbbcdddeff，输出abcdef 5

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#define N 105
int main()
{
	char ch_1[N] = { 0 };//原数组存输入
	char ch_2[N] = { 0 };//新数组存输出
	int count=0;//重复元素个数
	int k = 0;//新数组的下标
	gets(ch_1);//输入
	int len_1 = strlen(ch_1);
	for (int i = 0; i < len_1; i++)
	{
		for (int j = 0; j < i; j++)
		{
			if (ch_1[i] == ch_1[j])
			{
				ch_1[j] = -1;//重复元素标记为-1
				count++;//重复元素个数
			}
		}
	}
	for (int i = 0; i < len_1; i++)
	{
		if (ch_1[i] != -1)
		{
			ch_2[k++] = ch_1[i];//去掉重复元素存入新数组
		}
	}
	for (int i = 0; i < k; i++)
	{
		printf("%c", ch_2[i]);
	}
	printf(" %d", count);
	
	return 0;
}