c - Concatenating Strings-changing words into pig latin -

-

i keep receiving "segmentation fault (core dumped)". how can swap first letter of given word user inputs end of word , add "ay". example: input "code" output "odecay"

#include<stdio.h> #include<string.h> int main() {    char pig[100],p[10],i[100];    int j,length;    printf("what word change pig latin");    scanf("%s",pig);    length=strlen(pig);    strcat(p,pig[0]);     for(j=0;j<length;j++)    {       pig[j]=pig[j+1];    }    strcat(pig,p);    strcat(pig,"ay");    printf("%s",pig);    return 0; }

how can swap first letter of given word user inputs end of word , add "ay"

  1. save first character ("letter")

    char c = pig[0];

  2. move rest of pig 1 char beginning

    memmove(pig, pig + 1, strlen(pig) - 1);

    alternativly use statement

    memmove(&pig[0], &pig[1], strlen(pig) - 1);

    (note memcpy() won't work here source , destiantion overlap.)

  3. replace "old" last character "old", stored first character

    pig[strlen(pig) - 1] = c;

  4. append "ay"

    strcat(pig, "ay");

  5. print result:

    printf("%s\n", pig);

there no need second "string", char-array.

assuming pig large enough, 1 char larger data scanned in user, 1 can ommit use of intermediate character `c, per sketch above.

  1. initialise pig 0s

    char pig[100] = "";

  2. scan in data 

    scanf("%98s", pig); /* add tests failure reading needed. */

  3. append first character of input, copy end of pig

    pig[strlen(pig)] = pig[0];

  4. move of pig 1 character beginning

    memmove(pig, pig + 1, strlen(pig) - 1);

  5. print result:

    printf("%s\n", pig);

Comments

Post a Comment

Popular posts from this blog

node.js - NodeJS remote terminal to Dropbear OpenWRT-Server -

-
i wandering whether there valid solution have remote terminal openwrt-box out of nodejs-app? connecting terminal works: ssh -i ~/.mykeys/id_rsa root@192.168.178.39 busybox v1.23.2 (2015-04-22 23:25:48 utc) built-in shell (ash) root@openwrt:~# the only interactive ssh solution nodejs doesn't interactive part described in readme.md following: var client = require('ssh2').client; var conn = new client(); conn.on('ready', function() { console.log('client :: ready'); conn.shell(function(err, stream) { if (err) throw err; stream.on('close', function() { console.log('stream :: close'); conn.end(); }).on('data', function(data) { console.log('stdout: ' + data); }).stderr.on('data', function(data) { console.log('stderr: ' + data); }); stream.end('ls -l\nexit\n'); }); }).connect({ host: '192.168.100.100', port: 22, username...
Read more

python - jinja2: TemplateSyntaxError: expected token ',', got 'string' -

-
i new jinja2 , having issue using python regular expression (re). in following code bold lines have error string in them. {% block content %} <div class="container"> {% l in lines %} {% if re.search(r"error", l) %} {# <<< throws error #} <b> {{ l }} </b> {% else %} {{ l }} <hr> {% endif %} {% endfor %} </div> {% endblock %} the re.search above throws following error: jinja2.exceptions.templatesyntaxerror templatesyntaxerror: expected token ',', got 'string' raw python code not supported in jinja2 template syntax. {% if re.search(r"error", l) %} replace line with {% if "error" in l %} can fix problem. if logical condition more complicated, should consider defining own custom filters (which can call python code) or complicated things in view layer. go check global namespace .
Read more

Qt4: how to send QString inside a struct via QSharedMemory -

-
i have struct struct control_data{ int column_number; qstring cell; }; i need send thread of qsharememory. read can't because qstring contains pointers inside. other ways? you have serialize struct byte array. can convert qstring const char* this: mystring.tostdstring().c_str(); but serializing qstring should work. the first step serialize struct qdatastream using qt, example here . then once struct can read , written can pass shared memory. a complete example of using qsharedmemory can found here . here relevant code: // first, test whether shared memory segment attached process. // if so, detach if (sharedmem.isattached()) { sharedmem.detach(); } ... qbuffer buffer; buffer.open( qbuffer::readwrite ); qdatastream out( &buffer ); out << youstruct; int size = buffer.size(); // size of int + size of qstring in bytes if ( !sharedmem.create( size ) ) { return; } // write shared memory sharedmem.lock(); char *to = (char*...
Read more