tichmt1.cpp

examples C,c++ codes programs

/* Tinh tich ma tran */
#include<stdio.h>
#include<conio.h>
#define MAX 10

void in_ma_tran(int A[MAX][MAX], int m, int n, char d)
{
  int i, j;

  printf("\nMa tran %c : ", d);
  for (i=0; i<m; i++)
  {
    printf("\n");
    for(j=0; j<n; j++)
      printf("%3d ",A[i][j]);
  }
}

void main()
{
  int A[MAX][MAX], B[MAX][MAX], C[MAX][MAX], n, m, l, i, j, k;

do {
    printf("\nNhap gia tri m (trong khoang 2 den 10)");
    scanf("%d", &m);
  } while (m<2 || m>10);
do {
    printf("\nNhap gia tri k (trong khoang 1 den 10)");
    scanf("%d", &k);
  } while (k<1 || k>10);
do {
    printf("\nNhap gia tri n (trong khoang 1 den 10)");
    scanf("%d", &n);
  } while (n<1 || n>10);


  
  printf("\nNhap ma tran A :\n ");
  for (i=0; i<m; i++)
    for (j=0; j<k; j++)
    {
      printf("A[%d,%d] = ", i+1, j+1);
      scanf("%d", &(A[i][j]));
    }
  printf("\nNhap ma tran B : \n ");
  for (i=0; i<k; i++)
    for (j=0; j<n; j++)
    {
      printf("B[%d,%d] = ", i+1, j+1);
      scanf("%d", &(B[i][j]));
    }
  in_ma_tran(A, m, k, 'A');
  in_ma_tran(B, k, n, 'B');


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