Borce

1.
#include <stdio.h>
int double_fact(int n) {
if (n == 0)
return 1;
else if (n == 1)
return 1;
else
return(n*double_fact(n-2));
}
int main(){
int n;
scanf("%d", &n);
printf("%d", double_fact(n));
return 0;
}

2.
#include <stdio.h>
int getProizvod(int num, int step)
{
int sum = 1;
if (step >= num)
return sum;
else
{
sum *= (num/step)%10;
return sum * getProizvod(num, step*=10);
}
}
int main()
{
int n;
scanf("%d", &n);
int proizvod = getProizvod(n, 1);
printf("%.2f", (double)proizvod/(double)n);
return 0;
}

3.
#include <stdio.h>
int getSuma(int num, int step)
{
int sum = num/step;
if (sum < 100)
return sum;
else
{
sum %= 100;
return sum+getSuma(num, step*=10);
}
}
int main()
{
int n; scanf("%d", &n);
printf("%d", getSuma(n, 1));
return 0;
}

4.
#include <stdio.h>
void izmini_rek(int a[], int n){
if (n!=0)
{
printf("%d ", a[--n]);
izmini_rek(a, n);
}
}
int main() {
int a[100], i, n;
scanf("%d",&n);
for (i=0;i<n;i++){
scanf("%d",&a[i]);
}
izmini_rek(a,n);
return 0;
}