c program to print yes if a matrix is triangular matrix and no if matrix is not triangular without using array

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ya nd i didn,t got any mark for this although after compilation it showed passed

A square matrix is called lower triangular if all the entries above the main diagonal are zero. Similarly, a square matrix is called upper triangular if all the entries below the main diagonal are zero.(wikki- link text)

For a given matrix square N,

run a loop to check if all the elements above diagonal OR all the elements below diagonal is 0 if any of the above condition is satisfied then it will be a diagonal matrix.

NOTE:- If both the condition is satisfied then it will be a diagonal matrix.