ds-lab/program2 at main · vampire-debug/ds-lab · GitHub

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#include<stdio.h>
#include<stdlib.h>
void main()
{
	int i,j,k,m,n,p,q,sum,choice;
	int *A[3],*B[3],*C[3];
	printf("enter the order of matrix 1\n");
	scanf("%d%d",&m,&n);
	printf("enter the order of matrix 2\n");
	scanf("%d %d",&p,&q);
	for(i=0;i<m;i++)
		A[i]=(int*)malloc(n*sizeof(int));
	for(i=0;i<p;i++)
		B[i]=(int*)malloc(q*sizeof(int));
	 printf("enter elements of matrix 1\n");
			for(i=0;i<m;i++)
 					for(j=0;j<n;j++)
  							scanf("%d",A[i]+j);

	printf("enter elements of matrix 2\n");
			for(i=0;i<p;i++)
 				for(j=0;j<q;j++)
  						scanf("%d",B[i]+j);
	while(1)
	{
	   	printf("\n 1->Addition of matrix  2->Multiplication of matrix   3->Exit");
		scanf("%d",&choice);

		switch(choice)
		{
			case 1:
				if(m!=p || n!=q)
					printf("Matrix order mismatch - Addition not possible\n");
				else{
					for(i=0;i<m;i++)
						C[i]=(int*)malloc(n*sizeof(int));

					for(i=0;i<m;i++)
 						for(j=0;j<n;j++)
  							*(C[i]+j)=  *(A[i]+j)+ *(B[i]+j);

					printf("\n Result of matrix addition:\n");
					for(i=0;i<m;i++)
					{
 						for(j=0;j<n;j++)
						{
							printf("\t%d",*C[i]+j);
						}
						printf("\n");
					}
				}
					break;
			case 2:
				if(n!=p)
					printf("\nmatrices cannot be multiplied\n");
				else{
					for(i=0;i<p;i++)
					{
						C[i]=(int*)malloc(q*sizeof(int));
					}

					for(i=0;i<m;i++)
						for(j=0;j<p;j++)
						{
						   *(C[i]+j)=0;
						   for(k=0;k<n;k++)
        						*(C[i]+j)= *(C[i]+j)+ *(A[i]+k)* *(B[k]+j);
						}
					printf("\n Result of matrix Multiplicationn:\n");
					for(i=0;i<m;i++)
					{
 						for(j=0;j<q;j++)
						{
							printf("\t%d",*C[i]+j);
						}
						printf("\n");
					}
				}
					break;
			case 3: exit(1);
			}
		}
}