To find the sum of the matrix using function

In this program I have used the concept of finding the sum of the desired matrix using function. For  this the main concept that should be understood is how to pass array into function. I have given an example of 3*3 matrix. The user can make the program of any order using the given source code.
 For more idea have a look for the source code and the output which are given below:
The sample output is :

The main source code of the program is given below:

	#include<stdio.h>
	#include<conio.h>
	int a,b;
	int n1[3][3], n2[3][3],sum[3][3];
	int array( int [3][3],int n2[3][3]);
	int main()
	{
	printf("enter the elements of first matrix\n");
	for(a=0;a<3;a++)
	{
	for(b=0;b<3;b++)
	{
	scanf("%d",&n1[a][b]);
	}
	}
	printf("enter the elements of second order matrix\n");
	for(a=0;a<3;a++)
	{
	for(b=0;b<3;b++)
	{
	scanf("%d",&n2[a][b]);
	}
	}
	array (n1,n2);
	printf("\nthe sum of the corresponding matrix element is \n",sum[a][b]);
	for(a=0;a<3;a++)
	{for(b=0;b<3;b++)
	printf("%d ",sum[a][b]);
	printf("\n");
	}
	getch();
	}
	int array(int n1[3][3],int n2[3][3])
	{
	for(a=0;a<3;a++)
	{
	for(b=0;b<3;b++)
	{
	sum[a][b]=n1[a][b]+n2[a][b];
	}
	printf("\n");
	}}

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