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A simple output manipulator: sethex
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#include <iostream>
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#include <iomanip>
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using namespace std;
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ostream &sethex(ostream &stream)
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{
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stream.setf(ios::showbase);
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stream.setf(ios::hex, ios::basefield);
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return stream;
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}
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int main()
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{
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cout << 256 << " " << sethex << 256;
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return 0;
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}
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