В матрице A(3,5) найти сумму элементов
Var a:array [1..3,1..5] of integer; i,j,s:integer; begin randomize; for i:=1 to 3 do begin for j:=1 to 5 do begin a[i,j]:=random(21)-10; write (a[i,j]:4); end; writeln; end; for i:=1 to 3 do for j:=1 to 5 do s:=s+a[i,j]; writeln (s); readln; end.