Ответы на вопрос:
Pascal: function sum(var m: matrix; n: integer; s1,s2: num): real; var i,j: number; s: real; begin s: =0; for i: =1 to n do if i in s1 then for j: =1 to n do if j in s2 then s: =s+m[i,j]; sum: =s end; в pascalabc.net можно написать короче: function sum(var m: matrix; n: integer; s1,s2: num): real; var i,j: number; begin result: =0; foreach i in s1 do foreach j in s2 do result: =result+m[i,j] end;
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