b3tichmt.cpp

examples C,c++ codes programs

/* Tinh tich ma tran */
#include<iostream.h>
#include<conio.h>
#include<iomanip.h>
#define MAX 10
// a(mxk) * b(kxn)
void in_ma_tran(int A[MAX][MAX], int m, int n, char d)
{
int i, j;

cout<<"\nMa tran "<<d;
for (i=0; i<m; i++)
{
cout<<"\n";
for(j=0; j<n; j++)
cout<<A[i][j]<<setw(3);
}
}

void main()
{
  int A[MAX][MAX], B[MAX][MAX], C[MAX][MAX], n, m, l, i, j, k;
cout<<"\n CHUONG TRINH TINH TICH A(mxk) va B(kxn) ";
cout<<"\nNhap gia tri m = ";   
cin>>m;
cout<<"\nNhap gia tri k = ";
cin>>k;
cout<<"\nNhap gia tri n = ";
cin>>n;
  
    


  
cout<<"\nNhap ma tran A :\n";
  for (i=0; i<m; i++)
    for (j=0; j<k; j++)
    {
  cout<<"A["<<i+1<<"]["<<j+1<<"] = ";
    cin>>A[i][j];
    }
  cout<<"\nNhap ma tran B :\n";
  for (i=0; i<k; i++)
    for (j=0; j<n; j++)
    {
  cout<<"B["<<i+1<<"]["<<j+1<<"] = ";
    cin>>B[i][j];
    }
  in_ma_tran(A, m, k, 'A');
  in_ma_tran(B, k, n, 'B');


  for (i=0; i<m; i++)			/*A(mxk) va B(kxn)*/ 
    for (j=0; j<n; j++)
    {
      C[i][j] = 0;
      for (l=0; l<k; l++)
	C[i][j] += A[i][l] * B[l][j];
    }
  in_ma_tran(C, m, n, 'C');
  getch();
}