#include<stdio.h>
#define row 2
#define col 3
void mat_arith(int [][col], int [][col]); /* function prototype */
int main()
{
int a[row][col], b[row][col],i,j;
printf("\n Enter the elements of the first matrix.\n");
for(i=0; i<row; i++) /** Read first matrix elements **/
for(j=0; j<col; j++)
scanf("%d",&a[i][j]);
printf("\n Enter the elements of the second matrix.\n");
for(i=0; i<row; i++) /** Read second matrix elements **/
for(j=0; j<col; j++)
scanf("%d",&b[i][j]);
mat_arith(a,b); /** function call **/
}
void mat_arith(int a[][col], int b[][col])
{
int c[row][col],i,j,choice;
printf("\n For addition enter: 1 \n For subtraction enter: 2\n");
printf("\nEnter your choice: ");
scanf("%d",&choice);
for(i=0; i<row; i++)
for(j=0; j<col; j++)
{
if(choice==1)
c[i][j]= a[i][j] + b[i][j];
else if(choice==2)
c[i][j]= a[i][j] - b[i][j];
else
{
printf("\n Invalid choice. Task not done.");
return;
}
}
printf("\n The resulting matrix is:\n ");
for(i=0; i<row; i++)
{
for(j=0; j<col; j++)
printf("%d ", c[i][j]);
printf("\n\n ");
}
return;
}
Enter the elements of the first matrix.
1 2 3
1 2 3
Enter the elements of the second matrix.
3 2 1
3 2 1
For addition enter: 1
For subtraction enter: 2
Enter your choice: 1
The resulting matrix is:
4 4 4
4 4 4
First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.
After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.