1-misol: if,for,switch-case qatnashgan ixtiyoriy dastur tuzing (10-ball)

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1-misol: if,for,switch-case qatnashgan ixtiyoriy dastur tuzing (10-ball).
Massivning manfiy elementlarining o’rta arifmetigini chiqaruvchi dastur.
#include
using namespace std;
int main()
{
int m[] = {-2, 3, 0, -4, 4, 2, -5, 9, -10};
int l = sizeof(m)/sizeof(m[0]), soni = 0, y = 0;
for (int i = 0; i < l; i++) {
if (m[i] < 0) {
soni++;
y += m[i];
}
}
cout << "Manfiy elementlarining o'rta arifmetigi: " << (float)y/soni;
return 0;
}


2-misol:Ikki o’lchamli massivlarga doir ixtiyoriy dastur tuzing (10-ball)
Ikki o’lchamli massivning juft indexli satrlarini chiqaruvchi dastur.
#include

using namespace std;

int main()
{
int m, n;
cout << "m = "; cin >> m;
cout << "n = "; cin >> n;
int a[m][n];
for (int i = 0; i < m; i++) {
for (int j = 0; j < n; j++) {
cin >> a[i][j];
}
}
for (int i = 0; i < m; i+=2) {
cout << i << " - satr: ";
for (int j = 0; j < n; j++) {
cout << a[i][j] << " ";
}
cout << endl;
}
return 0;
}