matrix multiplication code

[amit kumar singh]

Hi everyone
I am new to this site and also new to programming world
can anybody help me writing C code for matrix multiplication (without using pointers)

Amit

[r035198x]

Hi everyone
I am new to this site and also new to programming world
can anybody help me writing C code for matrix multiplication (without using pointers)

Amit

You'd have to try writting something first. It is eaier to help when you've shown some of your ideas first.

[Nanthini Rajendiran]

Hi everyone
I am new to this site and also new to programming world
can anybody help me writing C code for matrix multiplication (without using pointers)

Amit

Hi amrit...Iam writing the simple matrix multiplication code for you without using pointers...

/* Description:To multiply given to matrix using arrays*/
#include<stdio.h>
#include<math.h>
main()
{
  int i,j,k;
 int a,b,c;/*three variables to get the row and colum of the two matrix*/
 int sum;
 int m[10][10],n[10][10],l[10][10];
 printf("The first matrix:\n");
 printf("Enter the number of rows and columns for the first matrix:\t")  ;
 scanf("%d%d",&a,&b);
 printf("The Second matrix:\n");
 printf(Enter the rows and columns of the second matrix:\t:);
 scanf("%d%d",&b,&c);
 
 /* Note: For matrix multiplication the number of columns in the first matrix should be equal to the number of rows in the second message*/
 
 printf(":Enter the values of the first matrix:\n");
 for(i=0;i<a;i++)
   {
     for(j=0;j<b;j++)
       {
         scanf("%d",&m[i][j]);
       }
   }
  printf("Enter the values of the second matrix:\n");
  for(i=0;i<b;i++)
   {
     for(j=0;j<c;j++)
      {
        scanf("%d",&n[i][j]);
      }
   }
   for(i=0;i<a;i++)
     {
    for(j=0;j<c;j++)
     {
       sum=0;
       for(k=0;k<b;k++)
        {
          sum=sum+(m[i][k]*n[k][j]);
          l[i][j]=sum;
        }
     }
  }
  printf("The multiplied matrix is:\n);
  for(i=0;i<a;i++)
   {
     for(j=0;j<c;j++)
      {
         printf ("%d",l[i][j]);
         printf("\t");
      }
       printf("\n");
   }
 

/*This the simple way to do matrix multiplication....You can also modify the program to your own choice...*/

[Nanthini Rajendiran]

Hi everyone
I am new to this site and also new to programming world
can anybody help me writing C code for matrix multiplication (without using pointers)

Amit

Amit I have told you the program.just work on th logic Behind it and try to modify the program...

[king99]

Hey! Can you post the code in C++ also, I really needs this code for my homework, but you have it in C.

[nikunjsod]

here is the code for c++=====>

# include <iostream.h>
# include <conio.h>
void main ()
{
clrscr();
int i,j,k,sum,a,b,c;
int m[10][10];
int n[10][10];
int l[10][10];
cout<<"ENTER THE NO. OF ROWS AND COLUMN OF FIRST MATRIX";
cin>>a>>b;
cout<<"ENTER THE VALUES OF FIRST MATRIX-";
for(i=0;i<a;i++)
{
for(j=0;j<b;j++)
{
cin>>m[i][j];
}
}
cout<<"ENTER THE NO. OF ROWS AND COLUMN OF SECOND MATRIX";
cin>>b>>c;
cout<<"ENTER THE VALUES OF SECOND MATRIX-";
for(i=0;i<b;i++)
{
for(j=0;j<c;j++)
{
cin>>n[i][j];
}
}

for(i=0;i<a;i++)
{
for(j=0;j<c;j++)
{
sum=0;
for(k=0;k<b;k++)
{
sum=sum+m[i][k]*n[k][j];
l[i][j]=sum;
}
}
}
cout<<"THE RESULTANT MATRIX IS-"<<endl;
for(i=0;i<a;i++)
{
for(j=0;j<c;j++)
{
cout<<l[i][j]<<" ";
}
cout<<endl;
}
getch();
}

[serhun]

======> HERE IS FOR JAVA MATRIX MULTIPLICATION
int A[][]=new int[3][3];
int B[][]=new int[3][3];
int C[][]=new int[3][3];
Scanner srh=new Scanner(System.in);
Random rnd=new Random();
for(int i=0;i<3;i++){
for(int j=0;j<3;j++){
System.out.println("Enter A: ");
A[i][j]=srh.nextInt();
}
}
for(int i=0;i<3;i++){
for(int j=0;j<3;j++){
System.out.println("Enter B: ");
B[i][j]=srh.nextInt();
}
}
for(int i=0;i<3;i++){
for(int j=0;j<3;j++){
C[i][j]=0;
for(int k=0;k<3;k++){
C[i][j]+=A[i][k]*B[k][j];
}
}
}
for(int i=0;i<3;i++){
for(int j=0;j<3;j++){
System.out.println("Value of C: "+C[i][j]);
}
}