MODULE PATTERN

Module pattern is a software design pattern which allows the software designer to break the software in modules and use the as and when required. This helps to remove redundancy in and create a better design.

EXAMPLE:

#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
using namespace std;
int ladder[6]={8,15,39,43,55,80};
int snakes[6]={14,38,42,79,82,99};


int main()
{
int p[4]={1,1,1,1},dice=0;
int roll_dice();
int add_pos(int,int);
int snake_bite(int);
int climb_ladder(int);
char choice;

int chance=0;
while(p[0] !=100 && p[1] !=100 && p[2] !=100 && p[3] !=100)
{
    chance=chance%4;
   cout<<"\n \nchance :"<< chance+1;
   cout<<"\n Do you wanna roll dice?(y)";

   while(choice!='y')
   {
   cin>>choice;
   }
   dice=roll_dice();
   cout<<"your no. is "<<dice;
   p[chance]=add_pos(p[chance],dice);
   cout<<"\n Your position is :"<<p[chance];
   choice='n';
chance++;
}
cout<<"\n"<<p[0]<<"\n"<<p[1]<<"\n"<<p[2]<<"\n"<<p[3];


return 0;
}
int roll_dice()
{
   int a = rand()%7;

 if(a==0)
 {
     a= roll_dice();
 }
    return a;
}
int snake_bite(int a )
{
    if(a==10)
    {
        a=6;
        cout<<"\n Snake bite";
    }
    else if(a==38)
    {
        a=28;
        cout<<"\n Snake bite";
    }
    else if(a==42)
    {
        a=19;
        cout<<"\n Snake bite";
    }
    else if(a==79)
    {
        a=50;
        cout<<"\n Snake bite";
    }
    else if(a==88)
    {
        a=30;
        cout<<"\n Snake bite";
    }
    else if(a==99)
    {
        a=5;
        cout<<"\n Snake bite";
    }
return a;
}
int climb_ladder(int a)
{
    if(a==8)
    {
        a=25;
        cout<<"\n congratulations you climbed ladder";
    }
    else if(a==15)
    {
        a=46;
        cout<<"\n congratulations you climbed ladder";
    }
    else if(a==39)
    {
        a=63;
        cout<<"\n congratulations you climbed ladder";
    }
    else if(a==43)
    {
        a=81;
        cout<<"\n congratulations you climbed ladder";
    }
    else if(a==55)
    {
        a=91;
        cout<<"\n congratulations you climbed ladder";
    }
    else if(a==80)
    {
        a=98;
        cout<<"\n congratulations you climbed ladder";
    }
return a;
}
int add_pos(int a,int b)
{

int pos=a+b;
if(pos>100)
{
    pos=a;
}

for(int i=0;i<6;i++)
{
    if(pos==snakes[i])
        pos=snake_bite(pos);
}
for(int i=0;i<6;i++)
{
    if(pos==ladder[i])
        pos=climb_ladder(pos);
}

return pos;
}

STRUCTURE:

OUTPUT:

http://en.wikipedia.org/wiki/Module_pattern