Equation or not?
02-24-2017, 03:59 PM (This post was last modified: 02-24-2017 04:13 PM by Han.)
Post: #2
 Han Senior Member Posts: 1,882 Joined: Dec 2013
RE: Equation or not?
This program returns the index (in L0) of the formula having only = as the "comparison" operator. You can easily change it to p(0):=L0(j); rather than p(0):=j; Note that we are assuming the strings are validly formed inequalities/equalities.

PHP Code:
export findeq()beginlocal j,k,n,m,p;L0:={"x+y=1","2x+2y<2","3x+3y<=3","4x+4y≤4","5x+5y>5","6x+6y>=6","7x+7y≥7","8x+8y<>8","9x+9y≠9"};L1:={"<","<=","≤",">",">=","≥","<>","≠"}; // note the removal of "="m:=size(L0);n:=size(L1);p:={};for j from 1 to m do  for k from 1 to n do    // if one of the other comparisons is found, skip to next equation    if instring(L0(j),L1(k)) then continue(2); end;  end;  // now check for = symbol  if instring(L0(j),"=") then p(0):=j; end;end;return(p);end;

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 Messages In This Thread Equation or not? - DrD - 02-24-2017, 02:50 PM RE: Equation or not? - Han - 02-24-2017 03:59 PM RE: Equation or not? - DrD - 02-24-2017, 04:22 PM RE: Equation or not? - Han - 02-24-2017, 04:37 PM RE: Equation or not? - Didier Lachieze - 02-24-2017, 08:02 PM RE: Equation or not? - EdDereDdE - 02-24-2017, 11:34 PM RE: Equation or not? - Didier Lachieze - 02-25-2017, 09:31 AM RE: Equation or not? - DrD - 02-25-2017, 11:03 AM RE: Equation or not? - Arno K - 02-28-2017, 10:32 PM RE: Equation or not? - Han - 03-01-2017, 12:23 AM RE: Equation or not? - Arno K - 03-01-2017, 08:01 AM RE: Equation or not? - Han - 03-01-2017, 04:04 PM RE: Equation or not? - Arno K - 03-01-2017, 07:15 PM RE: Equation or not? - Han - 03-01-2017, 07:22 PM RE: Equation or not? - parisse - 03-02-2017, 07:35 AM RE: Equation or not? - DrD - 03-02-2017, 12:31 PM

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