找出字符串中最长数字

 //在字符串中实现找到最长数字字符串
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
int findnumstring(char *outputstr,char *inputstr)
{
    char *in=inputstr,*out=outputstr,*temp,*final;
    int count=0,maxlen=0;
    
    while(*in!='\0')
    {
        if(*in>47&&*in<58)
        {
            for(temp=in;*in>47&&*in<58;in++)//temp记录开始的地址
                count++;
        }
        else
            in++;
        if(maxlen<count)
        {
            maxlen=count;
            final=temp;
        }
        count=0;
    }
    for(int i=0;i<maxlen;i++)//将找到的字符放在新的字符串中
    {
        *out=*final;
        out++;
        final++;
    }
    *out='\0';
    return maxlen;
}
int main()
{
    char string[]="abcd12345eee125ss123456789";
    char *p=(char *)malloc(strlen(string)+1);
    int count=findnumstring(p,string);
    printf("%s\n numstring length =%d\n",p,count);
}