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- 5.Scrieti un program care citeste de la tastatura un numar natural n ,elementele unei matrici cu n linii si n coloane,numere intregi din intervalul[-100,100] apoi afiseaza pe ecran media aritmetica a elementelor strict pozitive ale matrici care sunt situate deasupra diagonalei principale.
- #include<iostream>
- using namespace std;
- int main()
- {int n,i,j,a[50][50],m;
- cout<<"n=";cin>>n;
- for(i=o;i<n;i++)
- for(j=0;j<n;j++)
- { cout<<a"["<<i<<"]["<<j<<"]=";
- cin>>a[i][j];
- }
- for(i=0;i<n;i++)
- { for(j=0;j<n;j++)
- cout<<a[i][j];
- cout<<endl;
- }
- for(i=0;i<n-1;i++)
- for(j=i+1;j<n;j++)
- { if(i<j&&a[i][j]>0)
- { m=m+a[i][j];
- m++;
- }
- }
- m=(float)m/((n*n-n)/2);
- cout<<m<<endl;
- return 0;
- }
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