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| 1 | Program Lab8_18; uses crt; | |
| 2 | ||
| 3 | const size_n=20; {Размер массива}
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| 4 | ||
| 5 | type vector=array [1..size_n] of real; {Описываем тип для вектора}
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| 6 | ||
| 7 | var x:vector; | |
| 8 | - | i:byte; |
| 8 | + | sum:real; |
| 9 | i:byte; | |
| 10 | ||
| 11 | Begin clrscr; | |
| 12 | Randomize; | |
| 13 | Write('--------------------------------------------------------------------------------');
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| 14 | Writeln(' Исходный массив:');
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| 15 | for i:=1 to size_n do | |
| 16 | Begin | |
| 17 | X[i]:=Random(101)-50.; | |
| 18 | Write(X[i]:7:2); | |
| 19 | end; | |
| 20 | Writeln; | |
| 21 | Write('--------------------------------------------------------------------------------');
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| 22 | - | for i:=1 to size_n do if not Odd(i) then Write(X[i]:7:2); |
| 22 | + | |
| 23 | for i:=1 to size_n do if not Odd(i) then | |
| 24 | Begin | |
| 25 | Sum:=Sum+X[i]; | |
| 26 | Write(X[i]:7:2); | |
| 27 | end; | |
| 28 | Writeln; | |
| 29 | Write('--------------------------------------------------------------------------------');
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| 30 | Writeln(' Сумма элементов с четными индексами: ', Sum:8:2);
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| 31 | Write('--------------------------------------------------------------------------------');
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| 32 | GotoXY(15,WhereY); Writeln('Для выхода из программы нажмите клавишу "Enter"');
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| 33 | Write('--------------------------------------------------------------------------------');
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| 34 | Readln; | |
| 35 | end. |
