#include<stdio.h>
#include<conio.h>
#include<math.h>
#define MAX 100
void NhapMaTran(float 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("%f", &a[i][j]);
		}
	}
}

void XuatMaTran(float a[][MAX], int n)
{
	for(int i = 0; i < n; i++)
	{
		for(int j = 0; j < n; j++)
		{
			printf("%8.3f",a[i][j]);
		}
		printf("\n\n");
	}
}

void HoanVi(float &a, float &b)
{
	float temp = a;
	a = b;
	b = temp;
}

void SapXep(float a[][MAX], int n)
{
	for(int i = 0; i <= n * n - 2; i++)
	{
		for(int j = i + 1; j <= n * n - 1; j++)
		{
			if(a[i / n][i % n] > a[j / n][j % n])
			{
				HoanVi(a[i / n][i % n], a[j / n][j % n]);
			}
		}
	}
}
int main()
{
	float a[MAX][MAX]; int n;
	NhapMaTran(a, n);
	XuatMaTran(a, n);
	SapXep(a, n);
	printf("\nMa tran vuong sau khi sap xep: \n");
	XuatMaTran(a, n);

	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
t.c: At top level:
Line 39: error: expected ';', ',' or ')' before '&' token
In function 'SapXep':
Line 48: error: 'for' loop initial declaration used outside C99 mode
Line 50: error: 'for' loop initial declaration used outside C99 mode