Bt6 chương 6

// ConsoleApplication24.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
#include <conio.h>
using namespace std;
void Max(int &iMax, int a[], int n)
{
    iMax = a[1];
    for (int i = 2; i <= n; i++)
    {
        if (iMax < a[i]) iMax = a[i];
    }
}
void Min(int &iMin, int a[], int n)
{
    iMin = a[1];
    for (int i = 2; i <= n; i++)
    {
        if (iMin > a[i]) iMin = a[i];
    }
}
void Sum(int a[], int n, int &sum)
{
    sum = 0;
    for (int i = 1; i <= n; i++)
    {
        sum += a[i];
    }
}

void main()
{
    int a[50], n, i, iMax, iMin, sum, pIck;
    cout << "bam 1 de nhap mang: ";
    cin >> pIck;
    if (pIck == 1)
    {

        cout << "nhap so luong phan tu cua mang: ";
        cin >> n;
        while (n <= 0)
        {
            cout << "nhap lai so luong phan tu cua mang: ";
            cin >> n;
        }
        for (i = 1; i <= n; i++)
        {
            cout << "nhap phan tu cua mang: ";
            cin >> a[i];
        }
        cout << "nhap 2 de tim phan tu lon nhat, 3 de tim phan tu nho nhat, 4 de tinh tong cac phan tu ";
        cin >> pIck;
        if (pIck == 2)
        {
            Max(iMax, a, n);
            cout << iMax << endl;
        }
        if (pIck == 3)
        {
            Min(iMin, a, n);
            cout << iMin << endl;
        }
        }
        if (pIck == 4)
        {

        Sum(a, n, sum);
        cout << sum;
        }

    _getch();


}