Write a C Program to add Subtract matrices.

#include<stdio.h> 
#include<stdio.h> 
//WAP to add Subtract matrices
void main()
{
	int i,j,rows,columns,a[100][100],b[100][100],Subtraction[100][100];

	printf("\n Please Enter Number of rows and columns  :  ");
	scanf("%d %d", &i, &j);

	printf("\n Please Enter the First Matrix Elements : \n");
	for(rows = 0; rows < i; rows++)
	{
		for(columns = 0;columns < j;columns++)
	{
		scanf("%d", &a[rows][columns]);
	}
	}

	printf("\n Please Enter the Second Matrix Elements : \n");
	for(rows = 0; rows < i; rows++)
	{
		for(columns = 0;columns < j;columns++)
	{
		scanf("%d", &b[rows][columns]);
	}
	}

	for(rows = 0; rows < i; rows++)
	{
		for(columns = 0;columns < j;columns++)
	{
		Subtraction[rows][columns] = a[rows][columns] - b[rows][columns];
		}
	}

	printf("\n After Subtracting Matrix a from Matrix b = a - b \n");
	for(rows = 0; rows < i; rows++)
	{
		for(columns = 0; columns < j; columns++)
	{
		printf("%d \t ", Subtraction[rows][columns]);
	}
	printf("\n");
	}
	getch();
}