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#include <stdio.h>	// Su dung ham printf va scanf
#include <conio.h>	// su dung getch()
#include <math.h>	// su dung ham tinh toan de tinh cac bai toan trong mang 2 chieu
//==========Ket thuc khai bao thu vien =======================//
//===============Ham con================================//
/*	Bai tap tinh toan tren mang 2 chieu goi chung la ma tran (matrix 1-2-3)
	Input: Nhap mang 2 chieu doi da 50x50 so nguyen co N hang va M cot, a[NxM]
	Output: Lam nhung tac vu sau:
	- Tinh tong toan bo matrix.
	- Tinh tong cua tung dong, tinh tong cua tung cot.
	- Tinh tong duong cheo cua ma tran neu la ma tran vuong
	- Tim trong ma tran phan tu nao la so nguyen to.
	- Gia su co ma tran filter kich thuoc mx1 toan so 1:  k[1,1,1,1,1.....,1]. 
	Nhan ma tran a[NxM]*k[Mx1] = b[Nx1]. Tinh b.
	
*/
//=======Nhap 2 kich thuoc chieu cua mang =========================//
void NhapKichThuocMang( int &n, int &m )
{
	n = 0 ;
	m =0 ;
	// khoi tao n  va m gia tri la 0 de dieu kien while dung ngay tu dau
	
	while ( n<= 0 || m <= 0 )	// Dieu kien de phai nhap n va m la ca 2 so deu > 0
	{
		if( n<=0 ) 	// trong truong hop n <= 0 thi bat nhap lai n
		{
			printf("\nMoi ban nhap n, chieu ngang cua ma tran: " );
			scanf("%d",&n);
		}
		else	// trong truongf hop m <= 0 thi bat nhap lai m
		{
			printf("\nMoi ban nhap m, chieu doc cua ma tran: " );
			scanf("%d",&m);
		}
	}	
}
//===============Ham nhap mang 2 chieu voi n m la hang va cot cho truoc=======================//
void NhapMang2Chieu( int a[50][50], int n, int m )
{
	for( int i = 0; i < n ; i++ ) // i di theo n, duyet theo tung hang
	{
		for ( int  j = 0 ; j< m; j++)	// j theo m nen trong moi hang se duyet tung cot trong hang do
		{
			printf("\nMoi ban nhap a[%d][%d]: ",i,j);
			scanf("%d", &a[i][j]);
		}
		
	}
}
//==============================ham xuat ma tran ===============================//
void XuatMang2Chieu( int a[50][50], int n, int m )
{ 
   printf("\n Noi dung ma tran :\n");
     for (int i = 0;i < m; i ++)// i di theo n, duyet theo tung hang
    {
    		for ( int  j = 0 ; j< n; j++)// j theo m nen trong moi hang se duyet tung cot trong hang do
    		    printf("\t%d",a[i][j]);
    		    printf ("\n");
	}
}
void XuatTongTheoDongvaCot( int a[50][50], int n , int m )
{
	int S;
	
	// Tinh theo COT 
	for( int i = 0 ; i < n ; i++ )
	{
		/// tuong ung voi tung dong. Se cong tong tat ca gia tri trong dong do
		S = 0; // Day la bien Tong cua dong thu i tuong ung
		// bien S dat trong for de moi dong tuong ung se reset S=0 lai tu dau
		for( int j = 0 ; j < m ; j++ ) // duyet tung phan tu trong day i
		{
			S= S + a[i][j]; // cong don vao bien S
		}
		/// Cho nay da ket thuc qua trinh tinh tong dong thu  i
		printf("\nTong cua dong %d la: %d",i , S);
	}

//void XuatTongTheoDongvaCot( int a[50][50], int n , int m )

// Tinh theo hang. 
	for( int j = 0 ; j < n ; j++ )
	{
		/// tuong ung voi tung dong. Se cong tong tat ca gia tri trong dong do
		S = 0; // Day la bien Tong cua dong thu i tuong ung
		// bien S dat trong for de moi dong tuong ung se reset S=0 lai tu dau
		for( int i = 0 ; i< m ; i++ ) // duyet tung phan tu trong day i
		{
			S= S + a[i][j]; // cong don vao bien S
		}
		/// Cho nay da ket thuc qua trinh tinh tong dong thu  i
		printf("\nTong cua dong %d la: %d",j , S);
	}

int Q=0;
     for(int i=0 ; i<n ; i++)
{
	for( int j = 0 ; j < m ; j++ )
	{
		Q=Q+ a[i][j];
	}
}
printf("\nTong cua mang 2 chieu la: %d",Q);
}
//=====================Tongduongcheomatran=======================//
void TongDuongCheoMaTran( int a[50][50], int n, int m )
{
   int s=0;
   if(n!=m ) 
printf("\n Khong Vuong Khong Choi");

for(int k = 0; k <=m; k++) 
 {
			long s = s + a[k][k];
  }
  printf("\nTong cua duong cheo la: %ld", s);
  
  }

//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++//
//++++++++++++++HAM MAIN+++++++++++++++++++++++++++++++++++++++++++++++//
int main(int argc, char** argv) {
	int a[50][50];	// mang 2 chieu ten a, co kich thuoc toi da la 50 hang va 50 cot
	int n = 0, m= 0;// n la hang cua ma tran, m la cot cua ma tran
	NhapKichThuocMang( n, m );
	NhapMang2Chieu( a ,n ,m );
	XuatMang2Chieu(a , n , m);
	XuatTongTheoDongvaCot(a , n , m);
	TongDuongCheoMaTran(a , n , m);
	getch();	// su dung de dung man hinh kem tra ket qua
	return 0;
}

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