C program to print unit matrix

C program to print unit matrix

Output:

Enter the elements of matrix to check for identity matrix or not:
1 0 0
0 1 0
0 0 1

1 0 0
0 1 0
0 0 1
       is an Identity matrix or Unit matrix

Implementation:

#include <stdio.h> #define r 3 //change size of row here #define c 3 //change size of column here void display(int a[r][c],int x,int y) { int i,j; for(i=0;i<x;i++) { for(j=0;j<y;j++) { printf("%d ",*(*(a+i)+j)); } printf("\n"); } } int main(void) { int a[r][c]; int i,j,flag=1; printf("Enter the elements of matrix to check for identity matrix or not:\n"); for(i=0;i<r;i++) { for(j=0;j<c;j++) { scanf("%d",&a[i][j]); } } /* checking for unit matrix or identity matrix */ for(i=0;i<r;i++) { for(j=0;j<c;j++) { if(i==j) { if(a[i][j]!=1) flag=0; } } } if(flag) { display(a,r,c); printf("\tis an Identity matrix or Unit matrix\n"); } else { display(a,r,c); printf("\tis not an identity matrix or not an unit matrix\n"); } return 0; }