c 字符串压缩

#include <stdio.h>
#include <string.h>
//查找该元素是否已经存在
int find(char t[],int len,char ch)
{
	int i;
	for(i = 0; i < len; i++)
	{
		if (t[i] == ch)
		{
			return 1;
		}
	}
	return 0;
}

char *CompressStr(char s[])
{
	char t[255];
	int i = 0,j,k=0,count=1;
	while(s[i])
	{
		j = i + 1;
		while ( s[j])
		{
			if (s[i] == s[j])
			{
				count++; //统计出现的次数	
			}
			j++;
		}
		int len = k; //数组长度
		if ( find(t,len,s[i]) == 0)
		{
			t[k++] = count+'0'; //转换为字符保存
			t[k++] = s[i];      //保存字符
		}
		count = 1; //重置
		i++;
	}
	t[k] = '\0';
	strcpy(s,t);
	return s;
}

int main(int argc, char *argv[])
{
	printf("Hello, world\n");
	
	char i,s[][20] = {"111225555","333AAAbbbb","ASdXDCdddddd","ababa"};
    for(i = 0; i < 4; ++i) {
        printf("原串: %s\n",s[i]);
        printf("压缩后: %s\n",CompressStr(s[i]));
    }

	return 0;
}