1.
#include <iostream>
#include <algorithm>
#include <iomanip>
#include <cmath>
using namespace std;
int main()
{
long long a[20], i, sum = 0, sum1 = 0;
for(i = 0; i < 20; i++)
{
cin >> a[i];
if(a[i] < 0)
{
sum += a[i];
sum1++;
}
}
for(i = 0; i < 20; i++)
cout << a[i] << " ";
cout << endl;
cout << sum << " " << sum1 << " " << sum / sum1 << endl;
return 0;
}
2.
#include <iostream>
#include <algorithm>
#include <iomanip>
#include <cmath>
using namespace std;
int main()
{
long long b[6][4], i, j;
for(i = 0; i < 6; i++)
{
for(j = 0; j < 4; j++)
{
b[i][j] = rand() % 100;
if(b[i][j] > 9 && b[i][j] < 100)
b[i][j] = 10;
cout << b[i][j] << " ";
}
cout << endl;
}
return 0;
}
Объяснение:
1.
#include <iostream>
#include <algorithm>
#include <iomanip>
#include <cmath>
using namespace std;
int main()
{
long long b[31], i;
for(i = 0; i < 30; i++)
{
b[i] = rand();
cout << b[i] << " ";
}
for(i = 0; i < 30; i++)
if(b[i] > 0)
cout << i << " " << b[i] << endl;
return 0;
}
2.
#include <iostream>
#include <algorithm>
#include <iomanip>
#include <cmath>
using namespace std;
int main()
{
long long b[5][5], i, j, sum = 1;
for(i = 0; i < 5; i++)
for(j = 0; j < 5; j++)
{
cin >> b[i][j];
if(i == j)
sum *= b[i][i];
}
for(i = 0; i < 5; i++)
{
for(j = 0; j < 5; j++)
cout << b[i][j] << " ";
cout << endl;
}
cout << sum << endl;;
return 0;
}
Объяснение:
var b:array[1..40]of integer;
i:integer;
begin
randomize;
for i:=1 to 40 do
begin
b[i]:=random(100);
if(i<=10)then b[i]:=b[i]*3;
write(b[i],' ');
end;
end.
2)
задается с клавиатуры
program gt;
var b:array[1..40]of integer;
i:integer;
begin
for i:=1 to 40 do
begin
read(b[i]);
if(i<=10)then b[i]:=b[i]*3;
end;
for i:=1 to 40 do
write(b[i],' ');
end.