## Monday, 26 December 2016

### 2-D Array Matrix Multiplication Rule

• Matrix a row must be same as Matrix B column
• Each Cell of Matrix A multiply by each column of matrix B
Code :

/*   #################################################
Girfa : Student Help
Multiplication of 2-d array
for more program visit : http://girfahelp.blogspot.in/p/c-language-array-programming.html
#################################################

*/
#include<stdio.h>
#include<conio.h>
void main()
{
int ar1[3][3],ar2[3][3],ar3[3][3],r,c,m,tmp;
clrscr();
printf("first array input\n");
for(r=0;r<3;r++)
{
for(c=0;c<3;c++)
{
printf("Enter no ");
scanf("%d",& ar1[r][c]);
}
}
printf("second array\n");
for(r=0;r<3;r++)
{
for(c=0;c<3;c++)
{
printf("Enter no ");
scanf("%d", &ar2[r][c]);
}
}
/*  Multiplication */
for(r=0;r<3;r++)
{
for(c=0;c<3;c++)
{
for(m=0,tmp=0;m<3;m++)
tmp+=ar1[r][m]*ar2[m][c];
ar3[r][c]=tmp;
}
}
clrscr();
printf("\nFirst array\n");
for(r=0;r<3;r++)
{
for(c=0;c<3;c++)
{
printf("\t%d",ar1[r][c]);

}
printf("\n");
}
printf("\nSecond array\n");
for(r=0;r<3;r++)
{
for(c=0;c<3;c++)
{
printf("\t%d",ar2[r][c]);

}
printf("\n");
}
printf("\nMultiplication of array\n");
for(r=0;r<3;r++)
{
for(c=0;c<3;c++)
{
printf("\t%d",ar3[r][c]);
}
printf("\n");
}

getch();

}