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POOn the lack of "int main(int argc, char* argv[])" knowledge
 

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  1. POOn the lack of "int main(int argc, char* argv[])" knowledge
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    <p>I'm a Physicist and, usually, I just want to get the calculations done and that's all I really need. Nevertheless I had been using </p> <pre><code>int main(int argc, char* argv[]) </code></pre> <p>and its very pleasing how the binary becomes flexible in levels that I didn't expect i.e. initializing variables</p> <pre><code>~$ ./program.exe a b c (a, b and c are numbers in this case, not letters ok?) </code></pre> <p>So the question is </p> <p><strong>*How do I "parse" or "pipe" things from one to another in this manner (or other) <em>without</em> using files?*</strong></p> <p>Example: say that "a.exe" gives a set of "X-Y" points (like on a spreadsheet) and I what to plug that on "b.exe". Or say I use a bash/awk script to format the output format of "a.exe" to plot it on, say, gnuplot.</p> <p><strong>-----------------------------------------</strong></p> <p>Hi again. I'm trying to do this but, I've still got problems. </p> <p>To see what I'm doing wrong I wrote the simplest program</p> <pre><code> #include &lt;cstdio&gt; #include &lt;iostream&gt; #include &lt;cmath&gt; using namespace std; int main(int argc, char* argv[]){ for (int i = 0; i &lt;= argc; i++) cout &lt;&lt; "argv[" &lt;&lt; i &lt;&lt; "]= " &lt;&lt; argv[i] &lt;&lt; endl; getchar(); return 0; } </code></pre> <p>and made a file with the content (lets say it is "test.dat")</p> <pre><code> 1 2 3 4 5 6 </code></pre> <p>since I don't want to read the content of the file <em>on my program</em>, I just want to "throw it" to it, so I've tried</p> <pre><code>more test.dat | ./program.exe </code></pre> <p>or even</p> <pre><code> ./program.exe &lt;&lt; EOF 1 2 3 4 5 EOF </code></pre> <p>but it doesn't work and I thought it should.</p> <p>Thanks again.</p>
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    1. COThis question should be on stackoverflow.
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