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POStrange issue with ifstream read()
 

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  1. POStrange issue with ifstream read()
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    <p>I am new to the forum. I have a strange problem. I have a simple code which reads unformatted data from a file using read() function. The code is given below.</p> <pre><code>int main () { ifstream meshfile; char buf[1000], ch; memset(buf, 0, 1000); meshfile.open ("sometextfile"); meshfile.read (buf, 1000);//38+62+(19*47) + 7); cout &lt;&lt; strlen(buf) &lt;&lt; std::endl; cout &lt;&lt; buf &lt;&lt; std::endl; } </code></pre> <p>The code when run with the sample input file below gives 1006 as length of buf and prints additional characters for buf. Strangely, this happens only when bufsize is 1000 &amp; 1000 characters are read. Changing the bufsize to > 1000 and reading 1000 chars does not produce this error. Could this be a coding problem?</p> <p>The sample input file is <br/></p> <blockquote> <p>fdjgjdskgggggggggggggggggggggggggggggj bvjgdsv dsjkvgds gvdsj gvjdsgvjksdjkfgdsjkgfdsjgfsdjgfjkdsgfkjsdgjfgsdjfgdsjgfsdjgfjsdgfjsgfjsdgfjgsdjfgsdjfgdsjgfsdjgfsdjgfjsdgfjsdgfjsdg fdjgjdskgggggggggggggggggggggggggggggj bvjgdsv dsjkvgds gvdsj gvjdsgvjksdjkfgdsjkgfdsjgfsdjgfjkdsgfkjsdgjfgsdjfgdsjgfsdjgfjsdgfjsgfjsdgfjgsdjfgsdjfgdsjgfsdjgfsdjgfjsdgfjsdgfjsdg fdjgjdskgggggggggggggggggggggggggggggj bvjgdsv dsjkvgds gvdsj gvjdsgvjksdjkfgdsjkgfdsjgfsdjgfjkdsgfkjsdgjfgsdjfgdsjgfsdjgfjsdgfjsgfjsdgfjgsdjfgsdjfgdsjgfsdjgfsdjgfjsdgfjsdgfjsdg fdjgjdskgggggggggggggggggggggggggggggj bvjgdsv dsjkvgds gvdsj gvjdsgvjksdjkfgdsjkgfdsjgfsdjgfjkdsgfkjsdgjfgsdjfgdsjgfsdjgfjsdgfjsgfjsdgfjgsdjfgsdjfgdsjgfsdjgfsdjgfjsdgfjsdgfjsdg fdjgjdskgggggggggggggggggggggggggggggj bvjgdsv dsjkvgds gvdsj gvjdsgvjksdjkfgdsjkgfdsjgfsdjgfjkdsgfkjsdgjfgsdjfgdsjgfsdjgfjsdgfjsgfjsdgfjgsdjfgsdjfgdsjgfsdjgfsdjgfjsdgfjsdgfjsdg fdjgjdskgggggggggggggggggggggggggggggj bvjgdsv dsjkvgds gvdsj gvjdsgvjksdjkfgdsjkgfdsjgfsdjgfjkdsgfkjsdgjfgsdjfgdsjgfsdjgfjsdgfjsgfjsdgfjgsdjfgsdjfgdsjgfsdjgfsdjgfjsdgfjsdgfjsdg</p> </blockquote>
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    1. PO
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    1. USMario Sannum
    1. USSuman Vajjala
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    3. PO
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    1. This table or related slice is empty.
    1. COYour sample input file has 1068 characters... Why don't you just use the std::string class and do std::string str; meshfile >> str;? Surely letting the string class handle memory management is better than you setting an arbitrary buffer size...
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      1. POStrange issue with ifstream read()
      1. USlightalchemist
    2. CO@lightalchemist I want to do a buffered read. The problem is I don't get any error when I read > 1000 or < 1000. Only the particular case of buflength 1000 and reading 1000 characters gives a strange output
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      1. POStrange issue with ifstream read()
      1. USSuman Vajjala
 

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