76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
/* Matrix Diagonal - Program to check whether a given matrix is diagonal matrix */
|
|
|
|
/* A diagonal matrix is that square matrix whose diagonal elements from upper left to lower right are non-zero and all other elements are zero. For example,
|
|
2 0 0
|
|
0 4 0
|
|
0 0 6
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <conio.h>
|
|
|
|
void main()
|
|
{
|
|
int x[10][10], nr, nc, r, c, flag ;
|
|
clrscr() ;
|
|
printf("Enter the number of rows and columns: ") ;
|
|
scanf("%d %d", &nr, &nc) ;
|
|
if(nr==nc) /* checking for square matrix */
|
|
{
|
|
printf("Enter elements of the matrix: \n") ;
|
|
for(r=0 ; r<nr ; r++)
|
|
for(c=0 ; c<nc ; c++)
|
|
scanf("%d", &x[r][c]) ;
|
|
flag=1 ;
|
|
for(r=0 ; r<nr ; r++)
|
|
for(c=0 ; c<nc ; c++)
|
|
if(r==c) /* true for diagonal elements */
|
|
{
|
|
if(x[r][c]==0)
|
|
flag=0;
|
|
}
|
|
else
|
|
{
|
|
if(x[r][c]!=0)
|
|
flag=0;
|
|
}
|
|
if(flag==1)
|
|
printf("The matrix is diagonal") ;
|
|
else
|
|
printf("The matrix is not diagonal") ;
|
|
}
|
|
else
|
|
printf("The matrix is not a sqaure matrix") ;
|
|
getch() ;
|
|
}
|
|
|
|
/*
|
|
Output1:
|
|
|
|
Enter the number of rows and columns: 3 3
|
|
Enter elements of the matrix:
|
|
11 0 0
|
|
0 22 0
|
|
0 0 44
|
|
The matrix is diagonal
|
|
|
|
Output2:
|
|
|
|
Enter the number of rows and columns: 3 3
|
|
Enter elements of the matrix:
|
|
11 0 2
|
|
0 22 0
|
|
0 0 44
|
|
The matrix is not diagonal
|
|
|
|
Output3:
|
|
|
|
Enter the number of rows and columns: 3 3
|
|
Enter elements of the matrix:
|
|
0 0 0
|
|
0 9 0
|
|
0 0 8
|
|
The matrix is not diagonal
|
|
*/
|
|
|