#include<stdio.h>
#include<conio.h>
#include<math.h>
#define MAX 100
void NhapMaTran(int a[][MAX], int &n)
{
	do
	{
		printf("\nNhap n: ");
		scanf("%d", &n);
		if(n < 1 || n > MAX)
		{
			printf("\nSo phan tu khong hop le. Xin kiem tra lai !");
		}
	}while(n < 1 || n > MAX);

	for(int i = 0; i < n; i++)
	{
		for(int j = 0; j < n; j++)
		{
			printf("\nNhap vao a[%d][%d] = ", i, j);
			scanf("%d", &a[i][j]);
		}
	}
}

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

int TimGiaTriLonNhatMaTranTamGiacTrenDuongCheoChinh(int a[][MAX], int n)
{
	int Max = a[0][n - 1];
	for(int i = 0; i < n - 1; i++)
	{
		for(int j = i + 1; j < n; j++)
		{
			Max = (a[i][j] > Max) ? a[i][j] : Max;
		}
	}
	return Max;
}

int TimGiaTriLonNhatMaTranTamGiacTrenDuongCheoPhu(int a[][MAX], int n)
{
	int Max = a[0][0];
	for(int i = 0; i < n - 1; i++)
	{
		for(int j = 0; j < n - 1 - i; j++)
		{
			Max = (a[i][j] > Max) ? a[i][j] : Max;
		}
	}
	return Max;
}
int main()
{
	int a[MAX][MAX], n;
	NhapMaTran(a,n);
	XuatMaTran(a,n);

	int Max = TimGiaTriLonNhatMaTranTamGiacTrenDuongCheoChinh(a, n);
	printf("\nGia tri lon nhat ma tran tam giac tren duong cheo chinh = %d", Max);

	int Max2 = TimGiaTriLonNhatMaTranTamGiacTrenDuongCheoPhu(a, n);
	printf("\nGia tri lon nhat ma tran tam giac tren duong cheo phu = %d", Max2);

	getch();
	return 0;
}

Line 17: error: conio.h: No such file or directory
Line 5: error: expected ';', ',' or ')' before '&' token
In function 'XuatMaTran':
Line 29: error: 'for' loop initial declaration used outside C99 mode
Line 31: error: 'for' loop initial declaration used outside C99 mode
In function 'TimGiaTriLonNhatMaTranTamGiacTrenDuongCheoChinh':
Line 42: error: 'for' loop initial declaration used outside C99 mode
Line 44: error: 'for' loop initial declaration used outside C99 mode
In function 'TimGiaTriLonNhatMaTranTamGiacTrenDuongCheoPhu':
Line 55: error: 'for' loop initial declaration used outside C99 mode
Line 57: error: 'for' loop initial declaration used outside C99 mode