#include<stdio.h>
#include<conio.h>
#include<math.h>
#define MAX 100
void nhap (int a[], int &n)
{
do
{
printf("\nNhap so phan tu: ");
scanf("%d", &n);
if(n <= 0 || n > MAX)
{
printf("\nSo phan tu khong hop le. Xin kiem tra lai !");
}
}while(n <= 0 || n > MAX);
for(int i = 0; i < n; i++)
{
printf("\nNhap a[%d]: ", i);
scanf("%d", &a[i]);
}
}
void xuat(int a[], int n)
{
for(int i = 0; i < n; i++)
{
printf("%4d", a[i]);
}
}
void Them1PhanTu(int a[], int &n, int ViTriThem, int PhanTuThem)
{
for(int i = n; i > ViTriThem; i--)
{
a[i] = a[i - 1];
}
a[ViTriThem] = PhanTuThem;
n++;
}
int main()
{
int n;
int a[MAX];
nhap(a, n);
xuat(a, n);
int ViTriThem, PhanTuThem;
// 0 <= ViTriThem <= n
do
{
printf("\nNhap vao vi tri can them (%d --> %d) ", 0, n);
scanf("%d", &ViTriThem);
if (ViTriThem < 0 || ViTriThem > n)
{
printf("\nVi tri khong hop le. Xin kiem tra lai !");
}
} while (ViTriThem < 0 || ViTriThem > n);
printf("\nNhap vao phan tu can them: ");
scanf("%d", &PhanTuThem);
Them1PhanTu(a, n, ViTriThem, PhanTuThem);
printf("\nMang sau khi them:\n");
xuat(a, n);
getch();
return 0;
}