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POC++ HelloWorld program compiled with MinGW crashes with "Illegal Argument"
 

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  1. POC++ HelloWorld program compiled with MinGW crashes with "Illegal Argument"
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    <p>I decided it was time that I learned C++, and after struggling for 3+ hours trying to get the compiler to work, I finally created a working program. However, it seemingly spontaneously broke when I tried to refactor the project in Eclipse by cutting and pasting it. The program simply crashes, and Windows brings up the dreaded dialogue "HelloWorld.exe has stopped working." A bit of debugging revealed that "cout" was considered an illegal argument. I looked some more into the issue, and I'm now suspicious that it has something to do with the compiler apparently being 32-bit, as I have a 64-bit system. The executable is listed in Eclipse as "HelloWorld.exe - [x86/le]." (Minus the period.) My program in full is below:</p> <pre><code>#include &lt;iostream&gt; using namespace std; int main(){ cout &lt;&lt; "Hello World!" &lt;&lt; endl; return 0; } </code></pre> <p>I've also just discovered that creating a new "HelloWorld" C++ project in Eclipse does absolutely nothing to fix the issue, even using the unmodified code and settings. Anyone have any suggestions as to why this would happen?</p> <p>EDIT: Debugging information: Upon running the program:</p> <pre><code>Hello World! Program received signal SIGNILL, Illegal instruction. 0x6fccc3c0 in libstdc++-6!_ZSt4cout () from C:\Windows\SysWOW64\libstdc++-6.dll (gdb) bt #0 0x6fccc3c0 in libstdc++-6~_ZSt4cout () from C:\Windows\SysWOW64\libstdc++-6.dll #1 0x6fc8908c in libstdc++-6~_ZSt4cout () from C:\Windows\SysWOW64\libstdc++-6.dll #2 0x004013be in libstdc++-6~_ZSt4cout () at HelloWorld.cpp:4 (gdb) </code></pre> <p>It should be noted that line 4 of the class now points to the cout call.</p>
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    1. CO`using namespace std;` is considered bad form. Use Google to find out why. There's nothing inherently wrong with the code you posted.
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      1. USCaptain Obvlious
    2. COThe most likely cause is some kind of ABI-related issue- your program is clearly valid (although for reference, `using namespace std;` is a terrible practice). There is no problem with a 32bit compiler or executable on a 64bit system. Eclipse simply must not be set up correctly.
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    3. COMy immediate advice would be to either compile from the command line (e.g., using MinGW) or else install Visual Studio. Getting Eclipse to work correctly under Windows can be challenging even for experienced programmers.
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      1. USJerry Coffin
 

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