How to create and explain Tower Game

Name : Om Chanlyta
Major : TMD
 Hello professor this video with code is create tower game :

#include <stdio.h>
#include <stdlib.h>
int main (void)
{
    int m;
    void hanoi(int n, char a, char b, char c);
    printf("Enter the number of discs>");
    scanf_s("%d",&m);
    printf("Step-by-step removal of discs: \n");
    hanoi(m,'1','2','3');
    system("pause");
    return 0;
}
void hanoi(int n, char x, char y, char z)
{
    if(n==1)
        printf("Move the top disk from pole % c to pole %c \n",x,z);
    else
    {
        hanoi(n-1,x,z,y);
        hanoi(1,x,y,z);
        hanoi(n-1,y,x,z);
    }
}

This is my link : http://www.youtube.com/watch?v=KfuUHfXSEik&feature=youtu.be