Ответы на вопрос:
Uses crt; const n = 100; var a: array[1..n] of real; i,k: integer; s: real; begin clrscr; k: =0; write('исходный массив: '); for i: = 1 to n do begin a[i]: =sin(i)*cos(i); write(' ',a[i]: 0: 3); if a[i] < > 0 then begin k: =k+1; s: =s+a[i] end; end; writeln; writeln('sr = ',s/k); readln end. результат работы программы: исходный массив: исходный массив: 0.455 -0.378 -0.140 0.495 -0.272 -0.268 0.495 -0.144 -0.375 0.456 -0.004 -0.453 0.381 0.135 -0.494 0.276 0.265 -0.496 0.148 0.373 -0.458 0.009 0.451 -0.384 -0.131 0.493 -0.279 -0.261 0.496 -0.152 -0.370 0.460 -0.013 -0.449 0.387 0.127 -0.493 0.283 0.257 -0.497 0.157 0.367 -0.462 0.018 0.447 -0.390 -0.123 0.492 -0.287 -0.253 0.497 -0.161 -0.364 0.463 -0.022 -0.445 0.392 0.118 -0.491 0.290 0.249 -0.498 0.165 0.361 -0.465 0.027 0.443 -0.395 -0.114 0.490 -0.294 -0.246 0.498 -0.169 -0.357 0.467 -0.031 -0.441 0.398 0.110 -0.489 0.297 0.242 -0.499 0.173 0.354 -0.468 0.035 0.439 -0.401 -0.105 0.488 -0.301 -0.238 0.499 -0.177 -0.351 0.470 -0.040 -0.437 sr = -0.00136006072493969
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