Identity Matrix Checker

/*	
		Humza KHawar 
		Lab Task
		Comparing Matrix with identity matrix
*/

#include<stdio.h>



void main()
{
	//initialization of array

	int matrix1[10][10] = { 0 },  size, flag = 0;


	//inputing size

	printf("\n Enter he size of the Square Matrix: ");
	scanf("%d", &size);

	//inputing elements of matrix
	printf("\nMatrix 1");
		for (int i = 0; i < size; i++)
		{
			for (int j = 0; j < size; j++)
			{
				printf("\nEnter Number [%d] [%d]: ", 1+i,1+ j);
				scanf("%d", &matrix1[i][j]);
			}
		}


	//printing the matrix
	printf("\nYour Matrix 1:\n");

		for(int i = 0; i < size; i++)
		{
			printf("\n |");
			for (int j = 0; j < size; j++)
			{
				printf(" %3d ", matrix1[i][j]);
			}
			printf(" |");
		}
	
	//checking each element of matrix 
		for (int i = 0; i < size; i++)
		{
			for (int j = 0; j < size; j++)
			{
				if ( ((matrix1[i][j] != 1) && (i==j)) || ((matrix1[i][j] != 0) && (i != j))) 
				{
					flag = 1; //flag is increased to 1 if any element is not equal to identity matrix
				}
			}
		}

	if (flag ==1)
	{
		printf("\n\nMatrix is NOT Identiy Matrix\n\n");
	}
	else
	{
		printf("\n\nMatrix is  Identiy Matrix\n\n");
	}
}