ответ:
uses crt;
var a: array[1..20,1..20] of real;
n,m,i,j: integer;
s: real;
begin
clrscr; randomize;
write('введите кол-во строк: '); readln(n);
write('введите кол-во столбцов: '); readln(m);
for i: =1 to n do
begin
for j: =1 to m do
begin
a[i,j]: =random(100)/10;
write(a[i,j]: 4: 1);
end;
writeln;
end;
for i: =1 to n do
begin
s: =0;
for j: =1 to m do
s: =s+a[i,j];
writeln('сумма ',i,'-ой строки: ',s: 0: 1);
end;
for j: =1 to m do
begin
s: =0;
for i: =1 to n do
s: =s+a[i,j];
writeln('сумма ',j,'-ого столбца: ',s: 0: 1);
end;
for j: =1 to m do
begin
s: =0;
if j mod 2 = 0 then
begin
for i: =1 to n do
s: =s+a[i,j];
writeln('среднее арифметическое ',j,'-ого столбца: ',s/m: 0: 1);
end;
end;
readln;
end.
объяснение:
const
n = 10;
m = 10;
var
i, j: integer;
a, b: array[1..n, 1..m] of integer;
f: boolean;
begin
for i := 1 to n do
begin
for j := 1 to m do
begin
a[i, j] := random(50);
write(a[i, j]:3, ' ');
end;
writeln;
end;
writeln;
for i := 1 to n do
begin
f := false;
for j := 1 to m do
begin
if not f and (a[i, j] mod 2 = 1) then begin
a[i, j] := 2 * a[i, j];
f := true;
end;
write(a[i, j]:3, ' ');
end;
writeln;
end;
end.