Program to check diagonal matrix and scalar matrix | Program to check matrix is scalar matrix or not . ; Function to check matrix is scalar matrix or not . ; Check all elements except main diagonal are zero or not . ; Check all diagonal elements are same or not . ; Driver function ; Function call
#include <bits/stdc++.h> NEW_LINE #define N  4 NEW_LINE using namespace std ; bool isScalarMatrix ( int mat [ N ] [ N ] ) { for ( int i = 0 ; i < N ; i ++ ) for ( int j = 0 ; j < N ; j ++ ) if ( ( i != j ) && ( mat [ i ] [ j ] != 0 ) ) return false ; for ( int i = 0 ; i < N - 1 ; i ++ ) if ( mat [ i ] [ i ] != mat [ i + 1 ] [ i + 1 ] ) return false ; return true ; } int main ( ) { int mat [ N ] [ N ] = { { 2 , 0 , 0 , 0 } , { 0 , 2 , 0 , 0 } , { 0 , 0 , 2 , 0 } , { 0 , 0 , 0 , 2 } } ; if ( isScalarMatrix ( mat ) ) cout << " Yes " << endl ; else cout << " No " << endl ; return 0 ; }