Lập trình C++ tính tích 2 ma trận!

**thienho** · 09-04-2013, 03:45 PM

[IMG]images/smilies/laughing.gif[/IMG] BT tính tích 2 ma trận

Mã:

#include <iostream>#include <cstdlib>#include <iomanip>using namespace std; void nhanmt(int x[10][10],int y[10][10],int z[10][10],int m,int n, int p){    int i, j, k ;    for (i = 1; i <= m; i++)    for (j = 1; j <= p; j++)    {        z[i][j] = 0;        for(k = 1;k <= p;k++)        z[i][j] = z[i][j] + x[i][k]*y[k][j];                }        cout <<"Tich hai ma tran vua nhap la "<<endl;        for(i = 1;i <= m;i++)            for(j = 1;j <= p;j++){                cout <<setw(4)<<z[i][j]<<setw(4);                if(j == n)                cout <<endl;            }    } main(){    int i,j;    int a[10][10], b[10][10], c[10][10] ;    int m, n, p ;    cout <<"Nhap so hang va so cot cua hai ma tran ";    cout << "m, n, p = " ; cin >> m >> n >> p ; // m ,n la hang va cot cua ma tran thu nhat; p la cot cua ma tran thu hai    for (i = 1; i <= m; i++)    for (j = 1; j <= n; j++){        cout << "a[" << i << "," << j << "] = " ;        cin >> a[i][j] ;    }    cout <<"Nhap ma tran thu hai "<<endl;    for (i = 1; i <= n; i++)    for (j = 1; j <= p; j++){        cout << "b[" << i << "," << j << "] = " ;        cin >> b[i][j];    }    nhanmt(a,b,c, m, n, p);    return 0;}

[IMG]images/smilies/online.gif[/IMG]

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**longcheng** · 09-04-2013, 06:38 PM

mình cũng vừa làm xong lên thỳ bạn làm . mọi người xem code nèo ! @@
không bằng bạn mình k phân hàm !!^^

Mã:

#include<iostream>
#include<string>
#include<windows.h>
using namespace std;
int main()
{
	int sum=0;
	int a[10][10];
	int b[10][10];
	int c[10][10];
	int x,y;	
	int n,m;
	cout<<"nhap so luong hang mang 2 chieu a : ";
	cin>>n;
	fflush(stdin);
	cout<<"nhap so luong cot mang 2 chieu a : ";
	cin>>m;
	for(int i=1;i<=n;i++)
		for(int j =1;j<=m;j++)
			{
				cout<<"phan tu thu ("<<i<<","<<j<<") la : ";
				cin>>a[i][j];
				
			}
	cout<<"nhap so luong hang mang 2 chieu b : ";
	cin>>x;
	fflush(stdin);
	cout<<"nhap so luong cot mang 2 chieu b : ";
	cin>>y;
	if(x!=m){
		cout<<" 2 Ma tran khong nhan duoc !
";
		return 0;
	}
	for(int i=1;i<=x;i++)
		for(int j =1;j<=y;j++)
			{
				cout<<"phan tu thu ("<<i<<","<<j<<") la : ";
				cin>>b[i][j];
				
			}
	for(int i=1;i<=n;i++)
		for(int j =1;j<=y;j++)
			{	
				for(int k=1;k<=m;k++)
				{
					sum+=a[i][k]*b[k][j];
				}
				c[i][j]=sum;
				sum=0;
			}
	system("cls"); 
	for(int i=1;i<=n;i++){
		for(int j =1;j<=y;j++)
			cout<<c[i][j]<<" ";	
		cout<<endl;
	}

	
	return 0;
}