Runtime evaluation/In an environment: Difference between revisions
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m (→{{header|Octave}}: modified to resemble to other examples) |
m (→{{header|Metafont}}: modified to resemble to other examples) |
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=={{header|Metafont}}== |
=={{header|Metafont}}== |
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<lang metafont>vardef evalit(expr s, |
<lang metafont>vardef evalit(expr s, va, vb) = |
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save x; x := |
save x,a,b; x := va; a := scantokens s; |
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x := vb; b := scantokens s; a-b |
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enddef; |
enddef; |
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show(evalit("2x+1", 5, 3)); |
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b := evalit("2x+1", 2); |
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show (a-b); |
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end</lang> |
end</lang> |
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