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