Question

Write a C program for the following: (i) (ii) (iii) (iv) (v) A function to read an NxM matrix (from console input). A function to display the NxM matrix on the screen. A function to add these two matrices. A function to subtract these two matrices. A function to multiply these two matrices. The program must also contain a main function that will first declare two 3x3 matrices A and B, allow input of data for A and B (using the function in (i)), and should continuously display a menu as follows: 1. Add the matrices 2. Subtract the matrices 3. Multiply the matrices 4. Exit Please enter your choice (1-4): Upon selection of 1 or 2 or 3, the program should display the corresponding result. When 4 is selected, the program should exit.

Answer 1

#include<stdlib.h> main() int A[3] [3]; array declarations int B[3] [3]; printf ("Enter matrix A elements :\n\n"); input (A): // calling input functions printf ("Enter matrix B elements :\n\n"); input (B); int n; int x=1; while (x) printf("1. Add matrix\n"); printf("2. Subtract matrices\n"); printf("3.multiply matrices\n"); printf("4.exit\n"); printf("Please enter your choice 1-4\n"); scanf("%d",&n); switch (n) // switch case case 1: case 2: Add (A,B); break; Subtract (A,B); break; Multiply (A,B); break; exit(0); break; } } case 3: case 4: //if you enter 4 program terminates...

void input (int num[3] [3] { int i, j; for (i = 0; i < 3; ++i) :",i+l); printf("Enter the $d row elemnts for(j = 0; j < 3; ++3) scanf("%d", &num[i][j]); //adding method void Add (int A[3][3], int B[3] [3]) { int i, j; printf ("Adding matrix :\n\n"); for (i = 0; i < 3; ++i) // outer loop no.of rows { for(j = 0; j < 3; ++j) //inner loop printf("%d\t", A[i][j]+B[i][j]); adding elements of matrix A and B printf("\n");

// subtracting matrix void Subtract (int A[3] [3], int B[3] [3]) { int i, j; printf ("Subtract matrix :\n\n"); for (i = 0; i < 3; ++i) { for (j = 0; j < 3; ++)) printf("%d\t", A[i][j]-B[1] [3]); printf("\n"); //outer loop no.of rows //inner loop // subtracting elements of matrix A and B void Multiply(int A[3][3], int B[3] [3]) //method wwwwwwwwwwww printf("matrix after multiplication\n\n"); int i, j, k; for (i = 0; i < 3; i++) for (j = 0; j < 3; j++) // this is for matrix multiplication int value = 0; for (k = 0; k< 3; k++) value = A[i] [k] *B[k] [3]; printf("%d\t", value); printf("\n");

- 0 X "C:\Users\N V KDocuments\fcs.exe" Enter matrix A elements : Enter the 1 row elemnts :2 3 4 Enter the 2 row elemnts :3 4 5 Enter the 3 row elemnts :4 5 6 Enter matrix B elements : Enter the 1 row elemnts :3 4 5 Enter the 2 row elemnts :2 3 4 Enter the 3 row elemnts :3 4 5 1. Add matrix 2. Subtract matrices 3.multiply matrices 4.exit Please enter your choice 1-4 1 Adding matrix : 7 1. Add matrix 2. Subtract matrices 83.multiply matrices 4.exit Please enter your choice 1-4 Process returned © (@xo) Press any key to continue execution time : 15.231 s

source code:

#include<stdio.h>
#include<stdlib.h>
main()
{
int A[3][3]; //array declarations
int B[3][3];
printf("Enter matrix A elements :\n\n");
input(A); //calling input functions
printf("Enter matrix B elements :\n\n");
input(B);

int n;
int x=1;
while(x)
{
printf("1.Add matrix\n");
printf("2.Subtract matrices\n");
printf("3.multiply matrices\n");
printf("4.exit\n");
printf("Please enter your choice 1-4\n");
scanf("%d",&n);

switch(n) //switch case
{
case 1: Add(A,B);
break;
case 2: Subtract(A,B);
break;
case 3: Multiply(A,B);
break;
case 4: exit(0); //if you enter 4 program terminates...
break;}}}
  

void input(int num[3][3])
{ int i,j;

for ( i = 0; i < 3; ++i)
{
printf("Enter the %d row elemnts :",i+1);
for ( j = 0; j < 3; ++j)
scanf("%d", &num[i][j]);
}
}

void Add(int A[3][3],int B[3][3]) //adding method
{ int i,j;

printf("Adding matrix :\n\n");
for ( i = 0; i < 3; ++i) //outer loop no.of rows
{ for ( j = 0; j < 3; ++j) //inner loop
printf("%d\t",A[i][j]+B[i][j]); //adding elements of matrix A and B
printf("\n");
}

}

void Subtract(int A[3][3],int B[3][3]) //subtracting matrix
{ int i,j;
printf("Subtract matrix :\n\n");

for ( i = 0; i < 3; ++i) //outer loop no.of rows
{ for ( j = 0; j < 3; ++j) //inner loop
printf("%d\t",A[i][j]-B[i][j]); //subtracting elements of matrix A and B
printf("\n");
}

}

void Multiply(int A[3][3], int B[3][3]) //method multiplicatoin
{
printf("matrix after multiplication\n\n");
int i, j, k;
for (i = 0; i < 3; i++)
{
for (j = 0; j < 3; j++) //this is for matrix multiplication
{
int value = 0;
for (k = 0; k < 3; k++)
value += A[i][k]*B[k][j];
printf("%d\t",value);
}
printf("\n");
}
}