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POC++ read from file and tokenize data
 

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  1. POC++ read from file and tokenize data
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    <p>I'm trying to create a C++ program that allows me to read from a file and find a match of an input from every line. Note that every line is a single record delimited by a coma. If a match has been found, the expected output will be a string from a record. </p> <blockquote> <p>For example: Data from file => </p> <p>andrew,andy,Andrew Anderson <br> jade,jaded,Jade Sonia Blade</p> <p>Input => jade</p> <p>Output => jaded</p> </blockquote> <p>How can I do this? I'm trying to implement strtok, but to no avail. So far I'm getting no good results. Can someone please help me with this?</p> <p>EDIT</p> <p>regarding this problem i think i am getting somewhere... but still the output screen crashes when i run it. this is my code</p> <pre><code> #include &lt;iostream&gt; #include &lt;fstream&gt; #include &lt;string&gt; using namespace std; main () { // string toks[]; char oneline[80],*del; string line, creds[4]; int x = 0; ifstream myfile; myfile.open("jake.txt"); if (myfile.is_open()) { while (!myfile.eof()) { getline(myfile,line); strcpy(oneline,line.c_str()); del = strtok(oneline,","); while(del!=NULL) { creds[x] = del; del = strtok(NULL,","); x++; } } myfile.close(); } else cout &lt;&lt; "Unable to open file"; system("pause"); } </code></pre> <p>can anyone shed light on this for me please?</p> <p>EDIT ....</p> <p>I have some progress on this one... the problem now is that when the input is matched with the next line, it crashes... </p> <pre><code>#include &lt;iostream&gt; #include &lt;fstream&gt; #include &lt;string&gt; using namespace std; main () { // string toks[]; char oneline[80],*del; string line, creds[3], username, password; int x = 0; cout&lt;&lt;"Enter Username: "; cin&gt;&gt;username; cout&lt;&lt;"Enter Password: "; cin&gt;&gt;password; ifstream myfile; myfile.open("jake.txt"); if (myfile.is_open()) { while (!myfile.eof()) { getline(myfile,line); strcpy(oneline,line.c_str()); del = strtok(oneline,","); while(del!=NULL) { creds[x] = del; del = strtok(NULL,","); ++x; } if((creds[0]==username)&amp;&amp;(creds[1]==password)) { cout&lt;&lt;creds[2]&lt;&lt;endl; break; } } myfile.close(); } else cout &lt;&lt; "Unable to open file"; system("pause"); } </code></pre> <p>can someone help me with this please?</p>
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    1. USJake Plaras
    1. USJake Plaras
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    1. COYou should accept good answers
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      1. POC++ read from file and tokenize data
      1. USzeller
    2. CODo you need to be worried about comma's with in a field itself? (Like nick name,"last name, first name",middle name)
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      1. USDan
    3. COSmells like programming class homework to me.
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      1. POC++ read from file and tokenize data
      1. USJohn R. Strohm
 

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