15. Write a interactive program to do the following computation by providing the option using the switch statement: .Add two matrices .Subtract two matrices .Multiply two matrices

#include <stdio.h>

#include <conio.h> main()

{

int a[10][10],b[10][10],c[10][10],i,j,k,m,n,p,q, choice; clrscr();

printf("\n Enter the order of matrix A mxn \n "); scanf("%d%d",&m,&n);

printf("\n Enter the order of matrix B pxq \n ");

scanf("%d%d",&p,&q);  printf("Enter values of matrix A \n"); for(i=1;i<=m;i++)

{

for(j=1;j<=n;j++) scanf("%d",&a[i][j]);

}

printf("Enter values of matrix B \n"); for(i=1;i<=p;i++)

{

for(j=1;j<=q;j++) scanf("%d",&b[i][j]);

}

while(1)

{

printf("Enter the values \n 1= Add \n 2= Subtract\n 3= Multiply \n two matrices ="); scanf("%d",&choice);

switch(choice)

{

case 1: if((m!=p)||(n!=q))

{

printf("Addition is not possible\n"); getch();

break;

}

if((m==p) && (n==q))

{

for(i=1;i<=m;i++) for(j=1;j<=q;j++)

{ c[i][j]=0;

c[i][j]=c[i][j]+a[i][j]+b[i][j];

}

for(i=1;i<=m;i++)

{

for(j=1;j<=q;j++) printf(" %d \t",c[i][j]); printf("\n");

}

break;

}

case 2: if((m!=p)||(n!=q))

{

printf("Subtraction is not possible\n"); getch();

break;

}

if((m==p) && (n==q))

{

for(i=1;i<=m;i++) for(j=1;j<=q;j++)

{ c[i][j]=0;

c[i][j]=c[i][j]+(a[i][j]-b[i][j]);

}

for(i=1;i<=m;i++)

{

for(j=1;j<=q;j++) printf(" %d \t",c[i][j]); printf("\n");

}

break;

}

case 3: if(n!=p)

{

printf("Multiplication is not possible\n"); getch();

break;

 

}

for(i=1;i<=m;i++) for(j=1;j<=q;j++)

{ c[i][j]=0;

for(k=1;k<=n;k++)

c[i][j]=c[i][j]+a[i][k]*b[k][j];

}

for(i=1;i<=m;i++)

{

for(j=1;j<=q;j++) printf(" %d \t",c[i][j]); printf("\n");

}

break;

default :exit(1);

} //end switch

} // end while

}