c - how to take integers as command line arguments? -

-

i've read a getopt() example doesn't show how accept integers argument options, cvalue in code example:

 #include <ctype.h>  #include <stdio.h>  #include <stdlib.h>  #include <unistd.h>   int  main (int argc, char **argv)  {    int aflag = 0;    int bflag = 0;    char *cvalue = null;    int index;    int c;     opterr = 0;     while ((c = getopt (argc, argv, "abc:")) != -1)      switch (c)        {        case 'a':          aflag = 1;          break;        case 'b':          bflag = 1;          break;        case 'c':          cvalue = optarg;          break;        case '?':          if (optopt == 'c')            fprintf (stderr, "option -%c requires argument.\n", optopt);          else if (isprint (optopt))            fprintf (stderr, "unknown option `-%c'.\n", optopt);          else            fprintf (stderr,                     "unknown option character `\\x%x'.\n",                     optopt);          return 1;        default:          abort ();        }     printf ("aflag = %d, bflag = %d, cvalue = %s\n",            aflag, bflag, cvalue);     (index = optind; index < argc; index++)      printf ("non-option argument %s\n", argv[index]);    return 0;  }

if ran above testop -c foo, cvalue foo, if wanted testop -c 42? since cvalue of type char *, cast optarg (int)? i've tried doing without using getopt() , accessing argv[whatever] directly, , casting integer, end large negative number when printing %d. i'm assuming i'm not dereferencing argv[] correctly or something, not sure...

you need use atoi() convert string integer.


Comments

Post a Comment

Popular posts from this blog

sql server - python to mssql encoding problem -

-
Image
greetings by using pymssql library, want write data mssql database encounter encoding issues. here sample code write db: # -*- coding: utf-8 -*- import _mssql .... connection info data here .... def mssql_connect(): return _mssql.connect(server=host, user=username, password=pass, database=db, charset="utf-8") con = mssql_connect() insert_ex_sql = "insert mydatabsae (id, programname, programdetail) values (1, 'test characters ÜŞiçÇÖö', 'löşüiiğĞü');" con.execute_non_query(insert_ex_sql) con.close() sadly data written db corrupted: the collacation of mssql db is: turkish_ci_as how can solved? here possible solution : the key insert_ex_sq.encode('your language encoder') . try instead: con.execute_non_query(insert_ex_sq.encode('your language encoder'))
Read more

java - SNMP4J General Variable Binding Error -

-
i trying use snmp4j snmp bulkget. when ever use snmp4j make call returned responseevent error says "general variable binding error" , data returned equal null. to debug: print out, console, exact oid , version number using in snmp4j. use printed out data snmpwalk on command line. valid results. know sending snmp4j correct pdu correct oid, version number, max repititions, etc. i have used snmp4j , code wrote succesffuly monitor other devices years. don't know different time. leaving me stumped. why "general variable binding error?" causes error? ideas debug? can reproduced? if so, first action should using wireshark or microsoft network monitor capture network packets. my guess agent gives generr response, not surprising, http://www.ietf.org/rfc/rfc1157.txt
Read more

c# - BasicHttpBinding equivalent CustomBinding using WCF Client and PHP WebService -

-
i running visual studio 2008 unit test c# webservice php using wcf , received following error: system.servicemodel.security.messagesecurityexception: http request unauthorized client authentication scheme 'anonymous'. authentication header received server 'ntlm,basic realm="(null)"'. ---> system.net.webexception: remote server returned error: (401) unauthorized.. i using windows xp sp3 machine, unit test vs 2008 , wcf connect php webservice. i have no control php webservice. cannot modify (neither configuration security). here config file client use webservice php: <system.servicemodel> <extensions> <bindingelementextensions> <add name="customtextmessageencoding" type="company.integracioneasyvista.customtextencoder.customtextmessageencodingelement,company.integracioneasyvista.customtextencoder, version=1.0.0.0, culture=neutral, publickeytoken=9744987c0853...
Read more