write a matrix multiplication in c++?

Question

matrix r is a product of matrix p and q. its 3x3 matrix multiplication. so i input p and q already (using i as column and j is row). i got
for (i=0; i>3; i++)
cin >> p[i][0] >> p[i][1] >> p[i][2];
for (j=0; j>3; j++)
cin >> p[0][j] >> p[1][j] >> p[2][j];

that's what i have to do according to my hw assignment. but then i dont know what is the formula for r which is the product of p and q.
can anybody help me with this?

Answer 1

this'll help explain what you're doing and why

http://msdn.microsoft.com/en-us/library/hh873134.aspx

Answer 2

Direct link to program:http://allcomputertopics.blogspot.in/2013/03/multiplication-of-array-matrix-with.html

Answer 3

Hi, this link may find useful to you



http://cplussplussatplay.blogspot.in/2012/01/3x3-matrix-multiplication.html

Answer 4

matrix multiplication will be three level nested loop

intiate your r <- p*q to all zeros

for (i=0; i<3; i++)

{

for (j=0; j<3; j++)

{



for (k=0;k<3; k++)

{

r[i][j] = r[i][j] + p[i][k] *q[k][j];



}

}

}







in your for loops for input it should be less than 3 not greater than 3.

Answer 5

Writing pseudo codes is relatively easy just suppose about the software common sense and write it in undeniable simple English in steps. If you need it to be more technical refine easy code blocks with their corresponding Java codes. All of the best

Answer 6

include

#include

void main()

{

clrscr();

int a[10][10],b[10][10],c[10][10],m,n,o,p,i;

cout<<"Enter number of rows of A: ";

cin>>m;

cout<<"Enter number of coloumns of A: ";

cin>>n;

cout<
//Coding by: sushil kumar bhaskar

//http://skbh.page.tl

for(i=0;i
{

for(j=0;j
{

cout<<"Enter element a"<
cin>>a[i][j];

}

}

cout<
cin>>o;

cout<<"Enter number of coloumns of B: ";

cin>>p;

cout<
for(i=0;i
{

for(j=0;j
{

cout<<"Enter element b"<
cin>>b[i][j];

}

}

cout<
for(i=0;i
{

for(j=0;j
{

cout<
}

cout<
}

cout<
for(i=0;i
{

for(j=0;j
{

cout<
}

cout<
}

if(n==o)

{

for(i=0;i
{

for(j=0;j
{

c[i][j]=0;

for(int k=0;k
{

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

}

}

}

cout<
for(i=0;i
{

for(j=0;j
{

cout<
}

cout<
}

}

else

cout<<"Multiplication not possible :(";

getch();

}