[Share]Mảng 2 chiều

Nhập,xuất mảng 2 chiều; max; max trên từng hàng, từng cột; max trên đường chéo chính, chéo phụ
code:

Mã:

#include <iostream>
using namespace std;
void main()
{
	//Nhap
	int a[10][10];
	int m,n,i,j;
	cout<<"Nhap so hang, so cot"<<endl;
	cin>>m>>n;
	cout<<"Nhap gia tri phan tu"<<endl;
	for(i=0;i<m;i++)
		for(j=0;j<n;j++)
		{
			cout<<"a["<<i+1<<"]["<<j+i<<"]=";
			cin>>a[i][j];
		}
	//Xuat
	for(i=0;i<m;i++)
	{
		cout<<endl;
		for(j=0;j<n;j++)
		{
			cout<<a[i][j]<<"\t";
		}
	}
	cout<<endl;
	//Phan tu lon nhat
	int max=a[0][0];int min=a[0][0];
	for(i=0;i<m;i++)
		for(j=0;j<n;j++)
		{
			if(max<a[i][j]) max=a[i][j];
			if(min>a[i][j]) min=a[i][j];
		}
	cout<<"Max="<<max<<endl;
	cout<<"Min="<<min<<endl;
	//Phan tu lon nhat tren tung hang
	int maxhang[10];
	for(i=0;i<m;i++)
	{
		maxhang[i]=a[i][0];
		for(j=0;j<n;j++)
		{
			if(maxhang[i]<a[i][j]) maxhang[i]=a[i][j];
		}

	}
	for(i=0;i<m;i++)
	{
		cout<<"Max hang "<<i+1<<" = "<<maxhang[i]<<endl;
	}
	//Phan tu lon nhat tren tung cot
	int maxcot[10];
	for(j=0;j<n;j++)
	{
		maxcot[j]=a[0][j];
		for(i=0;i<m;i++)
		{
			if(maxcot[j]<a[i][j]) maxcot[j]=a[i][j];
		}

	}
	for(j=0;j<n;j++)
	{
		cout<<"Max cot "<<j+1<<" = "<<maxcot[j]<<endl;
	}
	//Phan tu lon nhat tren duong cheo chinh
	if(m==n)
	{
		int maxcheo=a[0][0];
		for(i=0;i<m;i++)
			for(j=0;j<n;j++)
			{
				if(i==j) 
				{
					if(maxcheo<a[i][j]) maxcheo=a[i][j];
				}
			}
		cout<<"Max cheo = "<<maxcheo<<endl;
	}
	else cout<<"Khong ton tai duong cheo chinh"<<endl;
	//Phan tu lon nhat tren duong cheo phu
	if(m==n)
	{
		int maxphu=a[0][0];
		for(i=0;i<m;i++)
			for(j=0;j<n;j++)
			{
				if(i==n-1-j) 
				{
					if(maxphu<a[i][j]) maxphu=a[i][j];
				}
			}
		cout<<"Max phu = "<<maxphu<<endl;
	}
	else cout<<"Khong ton tai duong cheo phu"<<endl;

}

tks, đang cần.
có phần trộn mảng không bạn, nhân 2 ma trân nữa

Mã:

#include <iostream>
#define max 100
using namespace std;
//Ham nhap
void nhap(int a[max][max],int m, int n)
{
	for(int i=0;i<m;i++)
		for(int j=0;j<n;j++)
		{
			cout<<"a["<<i+1<<"]["<<j+1<<"]=";
			cin>>a[i][j];
		}
}
//Ham xuat
void xuat(int a[max][max], int m, int n)
{
	for(int i=0;i<m;i++)
	{
		for(int j=0;j<n;j++)
		{
			cout<<a[i][j]<<"\t";
		}
		cout<<endl;
	}
}
//Ham tong
void tong(int a[max][max], int b[max][max], int c[max][max], int m, int n)
{
	int i,j;
	for(i=0;i<m;i++)
		for(j=0;j<n;j++)
			c[i][j]=a[i][j]+b[i][j];
	for(i=0;i<m;i++)
	{
		for(j=0;j<n;j++)
		{
			cout<<c[i][j]<<"\t";
		}
		cout<<endl;
	}
}
//Ham tich
void tich(int a[max][max], int b[max][max], int c[max][max], int da,int ca,int cb)
{
	int i,j,k;
	for(i=0; i<da; i++)
		for(j=0; j<cb; j++)
		{
			c[i][j]=0;
			for(k=0;k<ca;k++)
			{
				c[i][j]=c[i][j]+a[i][k]*b[k][j];
			}
			cout<<"Ma tran tich 2 ma tran vua nhap..."<<endl;
			for(i=0;i<da;i++)
			{
				cout<<endl;
				for(j=0;j<cb;j++)
					cout<<c[i][j]<<"\t";
			}
		}
}

//Ham main
void main()
{
	int a[max][max],b[max][max],c[max][max],d[max][max];
	int da,ca,db,cb;
	cout<<"Nhap ma tran A"<<endl;
	cout<<"Nhap so dong, so cot"<<endl;
	cin>>da>>ca;
	nhap(a,da,ca);
	cout<<endl;
	cout<<"Nhap ma tran B"<<endl;
	cout<<"Nhap so dong, so cot"<<endl;
	cin>>db>>cb;
	nhap(b,db,cb);
	cout<<endl;
	cout<<"Hai ma tran vua nhap"<<endl;
	cout<<"Ma tran A"<<endl;
	xuat(a,da,ca);	cout<<endl;
	cout<<"Ma tran B"<<endl;
	xuat(b,db,cb);	cout<<endl;
//Kiem tra dieu kien tinh tong 
	if(da==db && ca==cb)
	{
		cout<<"Tong 2 ma tran"<<endl;
			cout<<"Ma tran C"<<endl;
			tong(a,b,c,da,ca);
	}
	else cout<<"Khong the cong 2 ma tran";
//Ham tich 2 man tran
	if(ca==db)
	{
		tich(a,b,d, da,ca,db);
	}
	else cout<<"Khong ton tai tich 2 ma tran";
}