Display a linear combination: Difference between revisions
Add Draco
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Line 856:
[-1] -> -e(1)</pre>
=={{header|Draco}}==
<syntaxhighlight lang="draco">proc abs(int n) int: if n<0 then -n else n fi corp
proc write_term(word index; int scalar; bool first) void:
if first then
if scalar<0 then write("-") fi
else
write(if scalar<0 then " - " else " + " fi)
fi;
if abs(scalar)>1 then
write(abs(scalar), '*')
fi;
write("e(",index,")")
corp
proc lincomb([*]int terms) void:
bool first;
word index;
first := true;
for index from 0 upto dim(terms,1)-1 do
if terms[index] /= 0 then
write_term(index+1, terms[index], first);
first := false
fi
od;
writeln(if first then "0" else "" fi)
corp
proc main() void:
[3]int a1 = (1,2,3);
[4]int a2 = (0,1,2,3);
[4]int a3 = (1,0,3,4);
[3]int a4 = (1,2,0);
[3]int a5 = (0,0,0);
[1]int a6 = (0);
[3]int a7 = (1,1,1);
[3]int a8 = (-1,-1,-1);
[4]int a9 = (-1,-2,0,3);
[1]int a10 = (-1);
lincomb(a1); lincomb(a2); lincomb(a3); lincomb(a4);
lincomb(a5); lincomb(a6); lincomb(a7); lincomb(a8);
lincomb(a9); lincomb(a10)
corp</syntaxhighlight>
{{out}}
<pre>e(1) + 2*e(2) + 3*e(3)
e(2) + 2*e(3) + 3*e(4)
e(1) + 3*e(3) + 4*e(4)
e(1) + 2*e(2)
0
0
e(1) + e(2) + e(3)
-e(1) - e(2) - e(3)
-e(1) - 2*e(2) + 3*e(4)
-e(1)</pre>
=={{header|EasyLang}}==
{{trans|Ring}}
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