C Program to Subtract Two Matrices

C program to subtract two matrices; Through this tutorial, we will learn how to subtract two matrices in c programs.

Algorithm to Subtract Two Matrices

Use the following algorithm to write a program to subtract two matrices; as follows:

• START
• Step 1 -> Input matrix 1 and matrix 2.
• Step 2 -> If the number of rows and number of columns of matrix 1 and matrix 2 are equal then execute step 3 else subtraction not possible
• Step 3 -> for i=1 to rows[matrix 1]
  • for j=1 to columns [matrix 1]
    • Input matrix 1 [i,j]
    • Input matrix 2 [i,j]
    • matrix 3 [i,j]= matrix 1 [i,j] – matrix 2 [i,j];
• step 4-> Display matrix 3 [i,j];
• STOP

C Program to Subtract Two Matrices

/* C Program to Subtract Two Matrices */

#include<stdio.h>

int main()
{
 	int i, j, rows, columns, a[10][10], b[10][10];
 	int Subtraction[10][10];

 	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");
  	}
 	return 0;
}

The output of the above c program; as follow:

Please Enter Number of rows and columns  :  3 3
Please Enter the First Matrix Elements
10 20 30
40 50 60
70 80 90
Please Enter the Second Matrix Elements
1 2 3
4 5 6
7 8 9
After Subtracting Matrix a from Matrix b = a - b
9 	 18 	 27
36 	 45 	 54
63 	 72 	 81 

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