C PROGRAM TO CHECK MATRIX IS UPPER OR LOWER OR TRIDIAGONAL MATRIX

C PROGRAM TO CHECK MATRIX IS UPPER OR LOWER OR TRIDIAGONAL MATRIX

#include<stdio.h>
#define n 4
int main()
{
int a[n][n],i,j,cnt=0,f=0,g=0,k=0,l=0,m=0;
float z=0;
printf("enter the elements of the matrix:-\n");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
scanf("%d",&a[i][j]);
if(a[i][j]==0)
cnt=cnt+1;
}
}
printf("%d\n",cnt);
z=(cnt*100)/(n*n);
printf("%f\n",z);
if(z>=(n*n)/2)
{
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
if((i<j) && a[i][j]!=0)
f=1;
else if((i>j) && a[i][j]!=0)
g=1;
}
}
if(f==1 && g!=1)
printf("lower triangular sparse matrix");
else if(f!=1 && g==1)
printf("upper triangular sparse matrix");
else
{
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
if((i==j) && a[i][j]!=0)
k=1;
if((i+1==j) && a[i][j]!=0)
l=1;
if((i==j+1) && a[i][j]!=0)
m=1;
}
}
if(k==1 && l==1 && m==1)
printf("tridiagnol sparse matrix");
}
}
else printf("not a sparse matrix");
return 0;
}

OUTPUT:-

In this program coding is done in the ubuntu software .It is basically used for student to use linux type operating system.Programmers can learn linux type operating system through this programs.