Răspuns :
2)
#include <iostream>
using namespace std;
int c,s,x,y,k,nr;
int main()
{
cout<<"k=";
cin>>k;
do
{
cout<<"x=";
cin>>x;
{
s=0;
y=x;
while(y)
{
c=y%10;
s+=c;
y=y/10;
}
if(s==k)
nr++;
}
}
while(x!=0);
cout<<nr;
return 0;
}
1)
#include <iostream>
using namespace std;
int i,inv,invnr,c,p,x,pi;
int main()
{
for(i=10;i<=99;i++)
{
inv=0;
invnr=0;
p=i*i;
while(p)
{
c=p%10;
inv=inv*10+c;
p=p/10;
}
x=i;
while(x)
{
c=x%10;
invnr=invnr*10+c;
x=x/10;
}
pi=invnr*invnr;
if (inv==pi)
cout<<i<<endl;
}
return 0;
}
3)
#include <iostream>
using namespace std;
int a,b,x,y,r;
int main()
{
cout<<"a=";cin>>a;
cout<<"b=";cin>>b;
x=a;
y=b;
while(b!=0)
{
r=a%b;
a=b;
b=r;
}
cout<<"Cel mai mic multiplu comun="<<x*y/a<<endl;
while(x!=y)
if(x>y)
x=x-y;
else y=y-x;
cout<<"Cel mai mare divizor comun="<<x;
return 0;
}
#include <iostream>
using namespace std;
int c,s,x,y,k,nr;
int main()
{
cout<<"k=";
cin>>k;
do
{
cout<<"x=";
cin>>x;
{
s=0;
y=x;
while(y)
{
c=y%10;
s+=c;
y=y/10;
}
if(s==k)
nr++;
}
}
while(x!=0);
cout<<nr;
return 0;
}
1)
#include <iostream>
using namespace std;
int i,inv,invnr,c,p,x,pi;
int main()
{
for(i=10;i<=99;i++)
{
inv=0;
invnr=0;
p=i*i;
while(p)
{
c=p%10;
inv=inv*10+c;
p=p/10;
}
x=i;
while(x)
{
c=x%10;
invnr=invnr*10+c;
x=x/10;
}
pi=invnr*invnr;
if (inv==pi)
cout<<i<<endl;
}
return 0;
}
3)
#include <iostream>
using namespace std;
int a,b,x,y,r;
int main()
{
cout<<"a=";cin>>a;
cout<<"b=";cin>>b;
x=a;
y=b;
while(b!=0)
{
r=a%b;
a=b;
b=r;
}
cout<<"Cel mai mic multiplu comun="<<x*y/a<<endl;
while(x!=y)
if(x>y)
x=x-y;
else y=y-x;
cout<<"Cel mai mare divizor comun="<<x;
return 0;
}