字符查找函数strchr

char *mystrchr(const char *str, const char c){	char *p = NULL;	for (char*newp = str; *newp != '\0'; newp++)	{		if (*newp==c)		{			p = newp;//一个一个的查找			break;		}	}	return p;}char *mystrchrdg(const char *str, const char c){	if (*str!='\0')	{		return NULL;	}	else	{		if (*str==c)		{			return str;//返回指针		}		mystrchrdg(++str, c);//循环区域终止	}}//mystrchrvoid main(){	char *pstr1 = mystrchr("zrf is rocket", 'z');	char *pstr2 = mystrchrdg("zrf is rocket", 'A');	printf("pstr2=%s\n", pstr2);	if (pstr1 == NULL)	{		printf("can not find");	}	else	{		printf("can  find  %p   存在此字符：%c\n", pstr1, *pstr1);	}	system("pause");}