uses crt;
const nmax=20;
type matr=array[1..nmax,1..nmax] of real;
function SumLine(a:matr;m,n,k:byte):real;
var i:integer;
s:real;
begin
if k>m then SumLine:=0
else
begin
s:=0;
for i:=1 to n do
s:=s+a[k,i];
SumLine:=s;
end;
end;
var a:matr;
m,n,i,j,k:byte;
begin
clrscr;
randomize;
repeat
write('Количество строк до ',nmax,' m=');
readln(m);
until m in [1..nmax];
repeat
write('Количество столбцов до ',nmax,' n=');
readln(n);
until n in [1..nmax];
writeln('Исходная матрица:');
for i:=1 to m do
begin
for j:=1 to n do
begin
a[i,j]:=10*random;
write(a[i,j]:5:1);
end;
writeln;
end;
writeln;
for i:=1 to 3 do
begin
repeat
write('Введите номер строки >0 k=');
readln(k);
until k>0;
writeln('Сумма в строке ',k,'=',SumLine(a,m,n,k):0:1);
end;
readln
end.