IMPLEMENTACIÓ DEL MAPA MULTIDIMENSIONAL EN C++

Multidimensional mapa s s'utilitzen quan volem assignar un valor a una combinació de tecles. La clau pot ser de qualsevol tipus de dades, incloses les definides per l'usuari. Els mapes multidimensionals són mapes imbricats; és a dir, mapeen una clau amb un altre mapa, que ell mateix emmagatzema combinacions de valors de clau amb els valors assignats corresponents.

Sintaxi:

 // Creating a two-dimensional map: map object; // Creating an N-dimensional map: map>objecte;>>>   Exemple 1:  
    
      
  
 
 

precedencia de l'operador java
     
      
     
    
 
 
 

     // C++14 code to implement two-dimensional map> > #include> using> namespace> std;> > int> main()> {> > >// Two-dimensional key> >map<>int>, map<>int>,>int>>> m;>>> >// For accessing outer map> >map<>int>, map<>int>,>int>>>::iterator itr;>>> >// For accessing inner map> >map<>int>,>int>>::iterador ptr;>>> >for> (>int> i = 0; i <2; i++) {> >for> (>int> j = 0; j <2; j++) {> >m[i][j] = i + j;> >}> >}> > >for> (>int> i = 0; i <2; i++) {> >for> (>int> j = 0; j <2; j++) {> > >// Accessing through array subscript> >cout <<>'First key is '> << i> ><<>' And second key is '> << j> ><<>' And value is '> << m[i][j] << endl;> >}> >}> > >cout <<>'
Now accessing map though iterator 

'>;> > >for> (itr = m.begin(); itr != m.end(); itr++) {> > >for> (ptr = itr->segon.inici(); ptr != itr->second.end(); ptr++) {>> >cout <<>'First key is '>   << ' And second key is '   << ' And value is '   }   }  }>  
 
 
 
    
recursivitat java
   
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com imprimir java
  Sortida:  
  First key is 0 And second key is 0 And value is 0 First key is 0 And second key is 1 And value is 1 First key is 1 And second key is 0 And value is 1 First key is 1 And second key is 1 And value is 2 Now accessing map though iterator First key is 0 And second key is 0 And value is 0 First key is 0 And second key is 1 And value is 1 First key is 1 And second key is 0 And value is 1 First key is 1 And second key is 1 And value is 2>
   Exemple 2:  
    
      
  
     
if else declaració java
      
     
    
 
     // C++14 code to implement two-dimensional map> // and inserting value through insert()> > #include> using> namespace> std;> > int> main()> {> > >// First key type is a string> >mapint, int>> m;     mapint, int>>::iterator itr;   mapa ::iterador ptr;     m.insert(make_pair('Noob', map ()));   m['Noob'].insert(make_pair(0, 5));     m.insert(make_pair('Geek', map ()));   m['Geek'].insert(make_pair(1, 10));     m.insert(make_pair('Geek', map ()));   m['Geek'].insert(make_pair(2, 20));     for (itr = m.begin(); itr != m.end(); itr++) { for (ptr = itr->second.begin(); ptr != itr->second.end(); ptr++) { cout<< 'First key is '   << ' And second key is '   << ' And value is '   }   }  }>  
 
 
 
    
lectura d'un fitxer csv en java
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  Sortida:  
  First key is Geek And second key is 1 And value is 10 First key is Geek And second key is 2 And value is 20 First key is Noob And second key is 0 And value is 5>

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