15 lines
696 B
HTML
15 lines
696 B
HTML
<a href="ex5big.c.html"><h2>Example 5 (64-bit version)</h2></a>
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<p>
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This example is a slight modification of Example 5 that illustrates the 64-bit
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integer support in hypre needed to run problems with more than 2B unknowns.
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<p>
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Specifically, the changes compared to Example 5 are as follows:
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<ol>
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<li> All integer arguments to HYPRE functions should be declared of type HYPRE_Int.
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<li> Variables of type HYPRE_Int are 64-bit integers, so they should be printed in the %lld format (not %d).
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</ol>
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<p>
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To enable the 64-bit integer support, you need to build hypre with the
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--enable-bigint option of the configure script. We recommend comparing this
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example with <a href="ex5.c.html">Example 5</a>.
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