Pgm to check given matrix is diagonal or not?

Answer 1

#include <stdio.h> #include <conio.h> void main() { int a[3][3],i,j,flg=0,flg2=0; clrscr(); printf("\n\t Enter 3*3 Matrix : "); for(i=0;i<3;i++) { for(j=0;j<3;j++) { scanf("%d",&a[i][j]); } } for(i=0;i<3;i++) { for(j=0;j<3;j++) { if(a[i]<a[j] && a[i][j]==0) { flg=flg+1; } if(a[i]>a[j] && a[i][j]==0) { flg2=flg2+1; } } } if(flg==3 && flg2==3) printf("\n\n Diagonal matrix !"); else printf("\n\n Not Diagonal matrix !"); getch(); }