matrix.c

#include<stdio.h>
#include<conio.h>

void addition(float a[][3],float b[][3],int n)
{
	int i,j;
	float c[3][3];

	printf("The value of addition of two matrix is:\n");
	for(i=0;i<n;i++)
		{
			for(j=0;j<n;j++)
			{
				c[i][j]=a[i][j]+b[i][j];
				printf("%.2f\t",c[i][j]);
			}
			printf("\n");
		}
}

void subtraction(float a[][3],float b[][3],int n)
{
	int i,j;
	float c[3][3];

	printf("The value of subtraction of two matrix is:\n");
	for(i=0;i<n;i++)
		{
			for(j=0;j<n;j++)
			{
				c[i][j]=a[i][j]-b[i][j];
				printf("%.2f\t",c[i][j]);
			}
			printf("\n");
		}
}

void multiplication(float a[][3],float b[][3],int n)
{
	int i,j,p;
	float c[3][3];

	printf("The value of multiplication of two matrix is:\n");
	for(i=0;i<n;i++)
		{
			for(j=0;j<n;j++)
			{
				c[i][j]=0;
				for(p=0;p<n;p++)
					c[i][j]+=a[i][p]*b[p][j];
				printf("%.2f\t",c[i][j]);
			}
			printf("\n");
		}
}

void main()
{
	float a[3][3],b[3][3];
	int i,j,n;
	char ch;

	printf("Addition->+\nSubtraction->-\nMultiplication->*\n");
	printf("Enter your choice:");
	scanf("%c",&ch);
	printf("\nEnter the matrix of size n x n:");
	scanf("%d",&n);
	printf("\nEnter the value of matrix 'a':");
	for(i=0;i<n;i++)
		{
			for(j=0;j<n;j++)
			{
				printf("\na[%d][%d]:",i+1,j+1);
				scanf("%f",&a[i][j]);
			}
	}

	printf("\nEnter the value of matrix 'b':");
	for(i=0;i<n;i++)
		{
			for(j=0;j<n;j++)
			{
				printf("\nb[%d][%d]:",i+1,j+1);
				scanf("%f",&b[i][j]);
			}
	}

	switch(ch)
	{
		case '+':addition(a,b,n);
			break;
		case '-':subtraction(a,b,n);
			break;
		case '*':multiplication(a,b,n);
			break;
		default:printf("Wrong choice");
	}

getch();
}