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);}