#include<stdio.h>
#include<conio.h>
#include<math.h>
#define MAX 100
void NhapMang(int a[][MAX], int &dong, int &cot)
{
	//Nhập số dòng
	do
	{
		printf("\nNhap vao so dong: ");
		// Cách tà đạo: scanf("dong =%d",&dong);  // Lúc nhập phải viết thêm  chữ ( dong =  ) ở khung console
		scanf("%d",&dong);

		if(dong < 1 || dong > MAX)
		{
			printf("\nSo dong khong hop le. Xin kiem tra lai!");
		}

	}while(dong < 1 || dong > MAX);

	//Nhập số cột
	do
	{
		printf("\nNhap vao so cot: ");
		scanf("%d",&cot);

		if(cot < 1 || cot > MAX)
		{
			printf("\nSo cot khong hop le. Xin kiem tra lai!");

		}

	}while(cot < 1 || cot > MAX);
	for(int i = 0; i < dong; i++)
	{
		for(int j = 0; j < cot; j++)
		{
			printf("\nNhap a[%d][%d] = ", i, j);
			scanf("%d", &a[i][j]);
		}
	}
}

void XuatMang(int a[][MAX], int dong, int cot)
{
	for(int i = 0; i < dong; i++)
	{
		for(int j = 0; j < cot; j++)
		{
			printf("%4d", a[i][j]);
		}
		printf("\n\n");
	}
}

int KiemTraNguyenTo(int n)
{
	if(n < 2)
	{
		return 0;
	}
	else if(n > 2)
	{
		if(n % 2 == 0)
		{
			return 0;
		}
		for(int i = 3; i <= sqrt((float)n); i += 2)
		{
			if(n % i == 0)
			{
				return 0;
			}
		}
	}
	return 1;
}

void LietKeCacDongCoNhieuSoNguyenToNhat(int a[][MAX], int dong, int cot)
{
	int dem[MAX] = {0};
	for(int i = 0; i < dong; i++)
	{
		for(int j = 0; j < cot; j++)
		{
			if(KiemTraNguyenTo(a[i][j]) == 1)
			{
				dem[i]++;
			}
		}
	}
	int Max = dem[0];
	for(int i = 1; i < dong; i++)
	{
		Max = (Max > dem[i]) ? Max : dem[i]; 
	}
	for(int i = 0; i < dong; i++)
	{
		if(Max == dem[i])
		{
			printf("\nDong %d co so nguyen to nhieu nhat: %d so nguyen to", i, Max); 
		}
	}
}
int main()
{
	int a[MAX][MAX], dong, cot;
	NhapMang(a, dong, cot);
	XuatMang(a, dong, cot);
	LietKeCacDongCoNhieuSoNguyenToNhat(a, dong, cot);

	getch();
	return 0;
}

Line 17: error: conio.h: No such file or directory
Line 5: error: expected ';', ',' or ')' before '&' token
In function 'XuatMang':
Line 46: error: 'for' loop initial declaration used outside C99 mode
Line 48: error: 'for' loop initial declaration used outside C99 mode
In function 'KiemTraNguyenTo':
Line 68: error: 'for' loop initial declaration used outside C99 mode
In function 'LietKeCacDongCoNhieuSoNguyenToNhat':
Line 82: error: 'for' loop initial declaration used outside C99 mode
Line 84: error: 'for' loop initial declaration used outside C99 mode
Line 93: error: redefinition of 'i'
Line 82: error: previous definition of 'i' was here
Line 93: error: 'for' loop initial declaration used outside C99 mode
Line 97: error: redefinition of 'i'
Line 93: error: previous definition of 'i' was here
Line 97: error: 'for' loop initial declaration used outside C99 mode