How do you write a C program for a matrix multiplication using array?

Answer 1

A C-program can be written for matrix addition and multiplication simply by using the two dimensional array function.

Answer 2

include <stdio.h>

int main()

{

int m, n, p, q, c, d, k, sum = 0;

int first[10][10], second[10][10], multiply[10][10];

printf("Enter the number of rows and columns of first matrix\n");

scanf("%d%d", &m, &n);

printf("Enter the elements of first matrix\n");

for ( c = 0 ; c < m ; c++ )

for ( d = 0 ; d < n ; d++ )

scanf("%d", &first[c][d]);

printf("Enter the number of rows and columns of second matrix\n");

scanf("%d%d", &p, &q);

if ( n != p )

printf("Matrices with entered orders can't be multiplied with each other.\n");

else

{

printf("Enter the elements of second matrix\n");

for ( c = 0 ; c < p ; c++ )

for ( d = 0 ; d < q ; d++ )

scanf("%d", &second[c][d]);

for ( c = 0 ; c < m ; c++ )

{

for ( d = 0 ; d < q ; d++ )

{

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

{

sum = sum + first[c][k]*second[k][d];

}

multiply[c][d] = sum;

sum = 0;

}

}

printf("Product of entered matrices:-\n");

for ( c = 0 ; c < m ; c++ )

{

for ( d = 0 ; d < q ; d++ )

printf("%d\t", multiply[c][d]);

printf("\n");

}

}

return 0;

}

Answer 3

#include<stdio.h>

#include<coin.h>

void main( ){

int a,b,sum;

clrscr( );

print f(enter first number);

scan f("%d",&a);

print f (enter second number)

scan f ("%d",%b);

sum = a+b ;

print f (enter addition )

scan f ("%d,%d",sum):

getch ( );

}

Answer 4

02

#include<stdio.h>

03

#include<conio.h>

04

#define max 10

05

void main()

06

{

07

int a[max][max];

08

int a1[max][max];

09

int a2[max][max];

10

int i,j,n,m,k,l,e;

11

clrscr();

12

printf("\nEnter the number of rows of first matrix:");//insertion of first matrix

13

scanf("%d",&n);

14

printf("\nEnter the number of columns of second matrix:");

15

scanf("%d",&m);

16

printf("\nEnter the elements of first matrix:\n");

17

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

18

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

19

scanf("%d",&a[i][j]);

20

printf("\nEnter the number of rows of second matrix:");//insertion of second matrix

21

scanf("%d",&k);

22

printf("\nEnter the number of columns of second matrix:");

23

scanf("%d",&l);

24

printf("\nEnter the elements of second matrix:\n");

25

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

26

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

27

scanf("%d",&a1[i][j]);

28

printf("\n First Matrix you entered:\n");//display of first matrix

29

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

30

{

31

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

32

printf("%d ",a[i][j]);

33

printf("\n");

34

}

35

printf("\n Second Matrix you entered:\n");//display of second matrix

36

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

37

{

38

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

39

printf("%d ",a1[i][j]);

40

printf("\n");

41

}

42

//Multiplication of these two matrices

43

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

44

{

45

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

46

{

47

a2[i][j]=0;

48

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

49

{

50

a2[i][j]=a2[i][j] + (a[i][e] * a1[e][j]);

51

}

52

}

53

}

54

printf("\n Multiplication of matrix is:\n");

55

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

56

{

57

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

58

printf("%d ",a2[i][j]);

59

printf("\n");

60

}

61

getch();

62

}

Answer 5

#include <stdio.h>

#include <conio.h>

void multiplication(int x[],int y[]);

void main (void)

{

int a[2][2],b[2][2],i,j,m,n;

clrscr();

printf("Enter 2x2 matrix:\n");

for(i=0;i<2;i++)

for(j=0;j<2;j++)

scanf("%d",&a[i][j]);

printf("\nEnter another 2x2 matrix");

for(m=0;m<2;m++)

for(n=0;n<2;n++)

scanf("%d",&b[i][j]);

multiplication(a,b);

getch();

}

multiplication(int x[],int y[])

{

int i,j,sum;

sum=0;

printf("The multiplication of both the matrices gives:\n");

for(i=0;i<2;i++)

{

for(j=0;j<2;j++)

sum=sum+a[i][j]*b[j][i];

printf("%d\n",sum);

}

}

Answer 6

#include<conio.h>

#include<stdio.h>

#include<alloc.h>

void main()

{

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

clrscr();

printf("Rows and coloumns of 1 st matrix:");

scanf("%d%d",&m,&n);

printf("Rows and coloumns of 2 nd matrix:");

scanf("%d%d",&p,&q);

if(n!=p)

{

printf("Not possible");

}

else

{

a=(int*)malloc(m*n*sizeof(int));

b=(int*)malloc(p*q*sizeof(int));

c=(int*)malloc(n*p*sizeof(int));

printf("Enter first matrix:");

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

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

scanf("%d",(*(a+i)+j));

printf("Enter second matrix:\n");

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

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

scanf("%d",(*(b+i)+j));

printf("First matrix is:\n");

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

{

printf("\n");

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

printf("%d\t",*(*(a+i)+j));

}

printf("\nSecond matrix is:\n");

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

{

printf("\n");

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

printf("%d\t",*(*(b+i)+j));

}

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

{

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

{

*(*(c+i)+j)=0;

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

*(*(c+i)+j)+=*(*(a+i)+k)*(*(*(b+k)+j));

}

}

printf("\nProduct=\n");

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

{

printf("\n");

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

printf("%d\t",*(*(c+i)+j));

}

}

getch();

}

Answer 7

Write your program and if you are having a problem post it here with a description of the problem you are having.

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