urgent dau coroana si 100pxt

Răspuns:
3.
#include <iostream>
#include <string.h>
using namespace std;
int main()
{
int n, nr=0, c;
cout<<"n=";cin>>n;
while(n){
c = n%10;
if(c%2==0){
nr++;
}
n /= 10;
}
cout<<nr;
return 0;
}
4.
#include <iostream>
using namespace std;
int main()
{
int n, s=0;
cout<<"n=";cin>>n;
int i=1;
while(i<=n){
s = s + i;
i = i+2;
}
cout<<s;
return 0;
}
3.
#include <iostream>
using namespace std;
int main(){
int a,k=0;
cin>>a;
while(a!=0){
if(a%10%2==0)
k++;
a/=10;
}
cout<<k;
}
4.
#include <iostream>
using namespace std;
int main(){
int n;
cin>>n;
cout<<n*n;
}