ddd

#include <iostream>
#include <fstream>
using namespace std;
ifstream f("matrice patratica.txt");
int main()
{
    int m[15][15],opt,i,j,n;
    f>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
         f>>m[i][j];
         cout<<"Alege:"<<endl<<"1.Afisare matrice"<<endl<<"2.Afisare zona de peste diagonala principala a matricei"endl<<"3.Afisarezoana de sub diagonala principala a matricei"<<endl<<"Afisare "
         cin>>opt;
         switch(opt)
         {
             case 1:
                 {cout<<"Afisare matrice";


    for(i=1;i<=n;i++)
        {

           for(j=1;j<=n;j++)
             {   if(i<j)
                 cout<<m[i][j]<<" ";
             }
             cout<<endl;
        }
         }
     case 2:
                 {cout<<"Afisare zona de peste diagonala principala a matricei"<<endl;


    for(i=1;i<=n;i++)
        {

           for(j=1;j<=n;j++)
             {   if(i<j)
                 cout<<m[i][j]<<" ";
             }
             cout<<endl;
        }
         }
         case 3:
                 {cout<<"Afisare zoana de sub diagonala principala a matricei"<<endl;


    for(i=1;i<=n;i++)
        {

           for(j=1;j<=n;j++)
             {   if(i>j)
                 cout<<m[i][j]<<" ";
             }
             cout<<endl;
        }
         }
         case 4:
                 {cout<<"Afisare diagonala principala a matricei";


    for(i=1;i<=n;i++)
        {

           for(j=1;j<=n;j++)
             {   if(i<j)
                 cout<<m[i][j]<<" ";
             }
             cout<<endl;
        }
         }

}