Program-to-Multiply-Two-Matrices


            #define MAXROWS 30
#define MAXCOLS 30
void readinput(int a[][MAXCOLS],int m,int n);
void computeproduct(int a[][MAXCOLS],int b[][MAXCOLS],int c[][MAXCOLS],int m,int n,int p);
void writeoutput(int c[][MAXCOLS],int m,int p);
int z=0;
void main()
{
 /* char c;*/
 int nrows,ncols,mrows,mcols;
 int a[MAXROWS][MAXCOLS],b[MAXROWS][MAXCOLS],c[MAXROWS][MAXCOLS];
 clrscr();
 printf("
How many rows in the first matrix? ");
 scanf("%d",&nrows);
 printf("
How many cols in the first matrix? ");
 scanf("%d",&ncols);
 printf("
How many rows in the second matrix? ");
 scanf("%d",&mrows);
 printf("
How many cols in the second matrix? ");
 scanf("%d",&mcols);
 if (ncols != mrows)
 {
 printf("The product of these matrices is not defined.");
 getch();
 exit(0);
 }
 printf("
First table:
");
 readinput(a,nrows,ncols);
 printf("
Second table:
");
 readinput(b,mrows,mcols);
 computeproduct(a,b,c,nrows,ncols,mcols);
 printf("
Product of the matrices is:
");
 writeoutput(c,nrows,mcols);
 getch();
}
void readinput(int a[][MAXCOLS],int m,int n)
{
 int row,col;
 for (row=0;row {
 printf("
Enter data for row no. %4d
",row+1);
 for (col=0;col scanf("%d",&a[row][col]);
 }
 z=z+1;
 printf("	Table %d
",z);
 for (row=0;row {
 for (col=0;col printf("%d%c",a[row][col],' ');
 printf("
");
 }
 return;
}
void computeproduct(int a[][MAXCOLS],int b[][MAXCOLS],int c[][MAXCOLS],int m,int n,int p)
{
 int i,j,k,sum=0;
 for (i=0;i {
 for (j=0;j {
 for (k=0;k	sum=sum+(a[i][k]*b[k][j]);
 c[i][j]=sum;
 sum=0;
 }
 }
 return;
}
void writeoutput(int c[][MAXCOLS],int m,int p)
{
 int row,col;
 for (row=0;row {
 for (col=0;col printf("%6d",c[row][col]);
 printf("
");
 }
 return;
}
Beginners C
