C Language Extraction String

In case of only <stdio.h> and <string> header files, extract userid=123456 from below

HTTPS://WWW.CNBLOGS.COM/YSJD userid=123456 passwd=513920

The code is as follows:

1#include <stdio.h>2#include <string.h>3 4 intMyatoi (Charstr[])5 {6     intlen=strlen (str);7     Char*p=str+len-1;8     intsum=0, i=0, num;9      while(p>=str)Ten     { Onenum=*p- -; A          for(intj=0; j<i;j++) -         { -num*=Ten; the         } -i++; -sum+=num; -p--; +     } -     returnsum; + } A  at intGetUserId (Char*p,int*N) - { -     Char*q=strstr (P,"userid="); -     if(q==NULL) -         return 0; -q+=7; in     Charstr[ -]; -     intI=0; to      while(*q>='0'&& *q<='9') +     { -str[i]=*Q; thei++; *q++; $     }Panax Notoginsengstr[i]=' /'; -*n=myatoi (str); the     return 1; + } A intMain () the { +     Charstr[]="HTTPS://WWW.CNBLOGS.COM/YSJD userid=123456 passwd=513920"; -     intN; $     intRet=getuserid (str,&n); $     if(ret==0) -     { -printf"Not found\n");49    } -     ElseWuyi     { theprintf"userid=%d\n", n); -     } Wu}

C Language Extraction String