Water jug + O/P

#include<iostream>
using namespace std;
#include<conio.h>

int jar1=0,jar2=0;
void fill_jar1();
void fill_jar2();
void jar1_jar2();
void jar2_jar1();
void empty_jar1();
void empty_jar2();
void show_jars();

void main()
{
    int ch;
    clrscr();
    cout<<"capacity of jar 1 is 4 litre"<<endl;
    cout<<"capacity of jar 2 is 3 litre";
    do
    {
    cout<<"\n"<<endl;
    cout<<"1.fill jar"<<endl;
    cout<<"2.empty jar"<<endl;
    cout<<"3.pour from jar 1 to jar 2"<<endl;
    cout<<"4.pour from jar 2 to jar 1"<<endl;
    cout<<"5.show jars"<<endl;
    cout<<"enter choice:";
    cin>>ch;
    switch(ch)
    {
     case 1:int x;
        cout<<"\nenter 1 to fill jar 1"<<endl;
        cout<<"enter 2 to fill jar 2"<<endl;
        cout<<"enter choice:";
        cin>>x;
        if(x==1)
         fill_jar1();
        else if(x==2)
         fill_jar2();
        break;
     case 2:int y;
        cout<<"\nenter 1 to empty jar 1"<<endl;
        cout<<"enter 2 to empty jar 2"<<endl;
        cout<<"enter choice:";
        cin>>y;
        if(y==1)
         empty_jar1();
        else if(y==2)
         empty_jar2();
        break;
     case 3:jar1_jar2();
        break;
     case 4:jar2_jar1();
        break;
     case 5:show_jars();
        break;
     default:break;
    }
    }
    while((jar1!=2)&&(jar2<=3));
    cout<<"\nJar 1 contains 2 litres"<<endl;
    cout<<"problem solved"<<endl;
    getch();
}

void fill_jar1()
{
 jar1=4;
}

void fill_jar2()
{
 jar2=3;
}

void jar1_jar2()
{
 if((jar1==0)&&(jar2==0))
  cout<<"both jars are empty:";
 if((jar1==4)&&(jar2==3))
  cout<<"both jars are full:";
 while((jar1!=0)&&(jar2!=3))
 {
  jar1--;
  jar2++;
 }
 if(jar2==3)
  cout<<"jar2 is full";
}

void jar2_jar1()
{
 if((jar1==0 )&&(jar2==0))
  cout<<"jars are empty:";
 if((jar1==4)&&(jar2==3))
  cout<<"both jars are full:";
 while((jar1!=4)&&(jar2!=0))
 {
  jar1++;
  jar2--;
 }
 if(jar1==4)
  cout<<"jar1 is full";
}

void empty_jar1()
{
 jar1=0;
 cout<<"jar 1 is empty";
}

void empty_jar2()
{
 jar2=0;
 cout<<"jar 2 is empty";
}

void show_jars()
{
 cout<<"\n"<<endl;
 cout<<"|     |"<<"\t"<<"|     |"<<endl;
 cout<<"|  "<<jar1<<"  |"<<"\t"<<"|  "<<jar2<<"  |"<<endl;
 cout<<"|_____|"<<"\t"<<"|_____|"<<endl;
 cout<<" jar 1"<<"\t"<<" jar 2 "<<endl;
}

output:
1.fill jar
2.empty jar
3.pour from jar 1 to jar 2
4.pour from jar 2 to jar 1
5.show jars
enter choice:5

|     | |     |
|  0  | |  0  |
|_____| |_____|
 jar 1   jar 2

1.fill jar
2.empty jar
3.pour from jar 1 to jar 2
4.pour from jar 2 to jar 1
5.show jars
enter choice:1

enter 1 to fill jar 1
enter 2 to fill jar 2
enter choice:1

1.fill jar
2.empty jar
3.pour from jar 1 to jar 2
4.pour from jar 2 to jar 1
5.show jars
enter choice:5


|     | |     |
|  4  | |  0  |
|_____| |_____|
 jar 1   jar 2

1.fill jar
2.empty jar
3.pour from jar 1 to jar 2
4.pour from jar 2 to jar 1
5.show jars
enter choice:1

enter 1 to fill jar 1
enter 2 to fill jar 2
enter choice:2

1.fill jar
2.empty jar
3.pour from jar 1 to jar 2
4.pour from jar 2 to jar 1
5.show jars
enter choice:5


|     | |     |
|  4  | |  3  |
|_____| |_____|
 jar 1   jar 2

1.fill jar
2.empty jar
3.pour from jar 1 to jar 2
4.pour from jar 2 to jar 1
5.show jars
enter choice:2

enter 1 to empty jar 1
enter 2 to empty jar 2
enter choice:1

1.fill jar
2.empty jar
3.pour from jar 1 to jar 2
4.pour from jar 2 to jar 1
5.show jars
enter choice:5


|     | |     |
|  0  | |  3  |
|_____| |_____|
 jar 1   jar 2

1.fill jar
2.empty jar
3.pour from jar 1 to jar 2
4.pour from jar 2 to jar 1
5.show jars
enter choice:4

1.fill jar
2.empty jar
3.pour from jar 1 to jar 2
4.pour from jar 2 to jar 1
5.show jars
enter choice:5


|     | |     |
|  3  | |  0  |
|_____| |_____|
 jar 1   jar 2

1.fill jar
2.empty jar
3.pour from jar 1 to jar 2
4.pour from jar 2 to jar 1
5.show jars
enter choice:1

enter 1 to fill jar 1
enter 2 to fill jar 2
enter choice:2

1.fill jar
2.empty jar
3.pour from jar 1 to jar 2
4.pour from jar 2 to jar 1
5.show jars
enter choice:5


|     | |     |
|  3  | |  3  |
|_____| |_____|
 jar 1   jar 2

1.fill jar
2.empty jar
3.pour from jar 1 to jar 2
4.pour from jar 2 to jar 1
5.show jars
enter choice:4
jar1 is full

1.fill jar
2.empty jar
3.pour from jar 1 to jar 2
4.pour from jar 2 to jar 1
5.show jars
enter choice:5


|     | |     |
|  4  | |  2  |
|_____| |_____|
 jar 1   jar 2

1.fill jar
2.empty jar
3.pour from jar 1 to jar 2
4.pour from jar 2 to jar 1
5.show jars
enter choice:2

enter 1 to empty jar 1
enter 2 to empty jar 2
enter choice:1

1.fill jar
2.empty jar
3.pour from jar 1 to jar 2
4.pour from jar 2 to jar 1
5.show jars
enter choice:5


|     | |     |
|  0  | |  2  |
|_____| |_____|
 jar 1   jar 2

1.fill jar
2.empty jar
3.pour from jar 1 to jar 2
4.pour from jar 2 to jar 1
5.show jars
enter choice:4

1.fill jar
2.empty jar
3.pour from jar 1 to jar 2
4.pour from jar 2 to jar 1
5.show jars
enter choice:5


|     | |     |
|  2  | |  0  |
|_____| |_____|
 jar 1   jar 2

Jar 1 contains 2 litres
problem solved