# C program to find sum and subtraction of two matrices

```#include <stdio.h>

#define MAXROW      10
#define MAXCOL      10

/*User Define Function to Read Matrix*/
void readMatrix(int m[][MAXCOL],int row,int col)
{
int i,j;
for(i=0;i< row;i++)
{
for(j=0;j< col;j++)
{
printf("Enter element [%d,%d] : ",i+1,j+1);
scanf("%d",&m[i][j]);
}
}
}

/*User Define Function to Read Matrix*/
void printMatrix(int m[][MAXCOL],int row,int col)
{
int i,j;
for(i=0;i< row;i++)
{
for(j=0;j< col;j++)
{
printf("%d\t",m[i][j]);
}
printf("\n");
}
}

int main()
{
int a[MAXROW][MAXCOL],b[MAXROW][MAXCOL],result[MAXROW][MAXCOL];
int i,j,r1,c1,r2,c2;

printf("Enter number of Rows of matrix a: ");
scanf("%d",&r1);
printf("Enter number of Cols of matrix a: ");
scanf("%d",&c1);

printf("\nEnter elements of matrix a: \n");

printf("Enter number of Rows of matrix b: ");
scanf("%d",&r2);
printf("Enter number of Cols of matrix b: ");
scanf("%d",&c2);

printf("\nEnter elements of matrix b: \n");

/*sum and sub of Matrices*/
if(r1==r2 && c1==c2)
{
/*Adding two matrices a and b, and result storing in matrix result*/
for(i=0;i< r1;i++)
{
for(j=0;j< c1;j++)
{
result[i][j]=a[i][j]+b[i][j];
}
}

/*print matrix*/
printf("\nMatrix after adding (result matrix):\n");
printMatrix(result,r1,c1);

/*Subtracting two matrices a and b, and result storing in matrix result*/
for(i=0;i< r1;i++)
{
for(j=0;j< c1;j++)
{
result[i][j]=a[i][j]-b[i][j];
}
}

/*print matrix*/
printf("\nMatrix after subtracting (result matrix):\n");
printMatrix(result,r1,c1);

}
else
{
printf("\nMatrix can not be added, Number of Rows & Cols are Different");
}
return 0;
}
```

Output

```    Enter number of Rows of matrix a: 3
Enter number of Cols of matrix a: 3

Enter elements of matrix a:
Enter element [1,1] : 11
Enter element [1,2] : 22
Enter element [1,3] : 33
Enter element [2,1] : 44
Enter element [2,2] : 55
Enter element [2,3] : 66
Enter element [3,1] : 77
Enter element [3,2] : 88
Enter element [3,3] : 99

Enter number of Rows of matrix b: 3
Enter number of Cols of matrix b: 3

Enter elements of matrix b:
Enter element [1,1] : 1
Enter element [1,2] : 2
Enter element [1,3] : 3
Enter element [2,1] : 4
Enter element [2,2] : 5
Enter element [2,3] : 6
Enter element [3,1] : 7
Enter element [3,2] : 8
Enter element [3,3] : 9

Matrix after adding (result matrix):
12	24	36
48	60	72
84	96	108

Matrix after subtracting (result matrix):
10	20	30
40	50	60
70	80	90
```