#include <iostream>
int main(){return std::cout<<"1: X\n1: XX\n2: XXX\n3: "
             "XXXX\n4: XXXXX\n5: XXXXXX\n6: XXXXXXX\7";}

#include <iostream>
using namespace std;

int main()
{
  cout << "1: x" << endl
    << "2: xx" << endl
    << "3: xxx" << endl
    << "4: xxxx" << endl
    << "5: xxxxx" << endl
    << "6: xxxxxx" << endl
    << "7: xxxxxxx" << endl;
}

2.)

#include <iostream>
using namespace std;

int main()
{
  cout << "2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100" << endl;
  cout << "4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100" << endl;
  cout << "8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96" << endl;
}

bb

Und wähle nächstes Mal bitte einen brauchbaren Threadtitel...

bb

außerdem hab ich doch schon ne komplettlösung : D

die wahrscheinlich kaum Punkte bringt, da in meinen Augen momentan Schleifen das Thema sind...

#include<iostream>
int main(){
   for(int i=1;i!=8;++i) 
      std::cout<<i<<". "<<"XXXXXXXX\n"+i;
}

Mit Schleife:

#include<iostream>
int main(){
   for(int i=1;i!=8;++i) 
      std::cout<<i<<". "<<"XXXXXXXX\n"+i;
}

1. XXXXXXX                   
2. XXXXXX                    
3. XXXXX                     
4. XXXX                      
5. XXX                       
6. XX                        
7. X

#include<iostream> 
int main(){ 
   for(int i=1;i!=8;++i) 
      std::cout<<i<<". "<<"XXXXXXXX\n"+(8-i); 
}

#include <iostream>

class FolgenGenerator
{
    int m_max, m_diff;
    public:
        FolgenGenerator(int max, int diff)
         : m_max(max), m_diff(diff)
        {}
        int max() const
        {
            return m_max;
        }
        int diff() const
        {
            return m_diff;
        }
};

std::ostream& operator<<( std::ostream& s, const FolgenGenerator& gen )
{
    int val = gen.diff();
    {
        while(val <= gen.max()) {
            s << val << ", ";
            val += gen.diff();
        }
        return s;
    }
}

int main()
{
    typedef FolgenGenerator FG;
    std::cout << FG(100, 2) << std::endl
              << FG(100, 4) << std::endl
              << FG(100, 8) << std::endl;
}