Question

Am nevoie de ajutor cu primele 5 probleme la informatica de clasa a 9-a. In C++.

Answer 1

1.
#include <iostream>
using namespace std;
int x[100],n,i;
int main()
{
cin>>n;
for(i=1;i<=n;i++)
cin>>x[i];
for(i=1;i<=n;i++)
if(x[i]%2==0)
{cout<<"Elementul="<<x[i]<<"; Pozitia="<<i;
cout<<endl;}
return 0;
}

2.
#include <iostream>
using namespace std;
int n,x[100],i;
int main()
{
cin>>n;
if(n>=a&&n<=b)
{
for(i=1;i<=n;++)
cin>>x[i];
//a)
int s=0;
for(i=1;i<=n;i++)
if(x[i]>=0)
s=s+x[i];
cout<<"Suma elementelor pozitive="<<s<<endl;
//b)
int p=1;
for(i=1;i<=n;i++)
if(x[i]%2==0)
p=p*x[i];
cout<<"Produsul numerelor pare="<<p<<endl;
//c)
int s2=0;
for(i=1;i<=n;i++)
if(x[i]<0&&i%2!=0)
s2=s2+x[i];
cout<<"Suma elementelor negative de pe pozitii impare="<<s2<<endl;
//d)
float sm,nr;
int sm=0,nr=0;
for(i=1;i<=n;i++)
if(x[i]%5==2)
{sm=sm+x[i];
nr++;
}
cout<<"Media aritmetica a numerelor care impartite la 5 dau restul 2="<<float(sm/nr)<<endl;
//e)
int nr2=0;
for(i=1;i<=n;i++)
if(x[i]<6)
nr2++;
cout<<"Numarul elementelor mai mici decat 6="<<nr2<<endl;
//f)
int p;
cin>>p;
for(i=1;i<=n;i++)
if(x[p]%4==0)
cout<<"Al p-lea element este divizibil cu 4"<<endl;
else cout<<"Al p-lea element nu este divizibil cu 4"<<endl;
}
else cout<<"Valoarea lui n nu se afla in intervalul [a,b]";
}

3.
#include <iostream>
using namespace std;
int x[100],n,i,k;
int main()
{
cin>>n;
while(n)
{
c=n%10;
x[++i]=c;
k++;
n=n/10;
}
for(i=k;i>=1;i--)
cout<<x[i]<<" ";
}