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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main()
  5. //Mayar Mahmoud Mabrouk
  6. {
  7.     int i,j,n;
  8.     int a[5][5];
  9.     cout <<endl<<"enter the dimensions:";
  10.     cin>>n;
  11.     cout<<endl<<"enter  matrix elements > ";
  12. for(i=0;i<n;i++)
  13. for(j=0;j<n;j++)
  14. cin>>a[i][j];
  15. for(j=0; j < n; j++)
  16. {
  17.     i=0;
  18.     a[i][j] = a[i][j];
  19. }
  20.  
  21.  
  22. for(j=0; j < n; j++)
  23.  
  24. 	      a[1][j]= a[1][j]-(a[0][j]*(a[1][0] / a[0][0]));
  25.  
  26. for(j=0; j < n; j++)
  27.  
  28. 	      a[2][j]= a[2][j]-(a[0][j]*(-a[2][0] / a[0][0]));
  29.  
  30.   for(j=0; j < n; j++)   
  31. 	      a[2][j]=a[2][j]-(a[1][j]*(-a[2][1]/a[1][1]));
  32.  
  33. cout << "triangular matrix" << endl;
  34. for (i=0; i <= n; i++)
  35. {
  36.      for (j=0; j <= n; j++)
  37. 	cout << a[i][j] <<"    ";
  38. 	cout << endl;
  39.  
  40. }
  41.  
  42.  
  43.  return 0;
  44. }
  45.  
Success #stdin #stdout 0s 3460KB
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stdin
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3
4 4 3 
2 8 9 
1 6 4
stdout
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enter the dimensions:
enter  matrix elements > triangular matrix
4    4    3    2    
2    8    9    -1216970720    
1    6    4    134517028    
134514496    134517424    134517092    134515730
https://ideone.com/mnLmjC
language:
C++14 (clang 8.0)
created:
7 years ago
visibility:
public

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