strrchr【該怎麼用char 。T_T】

#include <stdio.h>

int *strrchr(char const  *str, int ch )    //原本這個函數的類型是char 但是考慮返回值因爲要計數所以改成int
{	
	int count=1;
	while(*str!='\0')
	{
		if(*str==ch)
			return count;
		else
		{
			count++;
			str++;
		}

	}
	return 0;
}

int main()
{	
	char ch = 'h' ;
	char str[] = "ellho,Drt";
	strrchr(str,ch);
	printf("%d\n",strrchr(str,ch));
	return 0;
}