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Visual C++ Compiler Error

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I recently uninstalled Visual C++ 6 Standard and Installed Visual C++ 6 Professional. The sole purpose was to be able to use SSE2 on my Pentium IV 2.4GHz. After installing Visual Studio I installed Serive Pack 5 then the Processor Pack designated for Service Pack 5. I then went on to making a simple program with inline SSE2 assembly. I found that quite a few opcodes would not compile but I was able to work around them for the time being. My main problem is that I can''t get the STL complex class to work now. The are probably other problem I have yet to run into. I tried to compile the following program: #include <iostream.h> #include <complex> int main() { complex a(3,4); cout << a << endl; return 0; } only to get the errors: complextest.cpp(7) : error C2065: ''complex'' : undeclared identifier complextest.cpp(7) : error C2062: type ''double'' unexpected complextest.cpp(8) : error C2065: ''a'' : undeclared identifier

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std::complex
or
using namespace std;

.lick

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Another error is your use of <iostream.h> (in conjunction with the standard headers even!) rather than the standard <iostream>

Qui fut tout, et qui ne fut rien