# Thread: problem with the loop

1. ## problem with the loop

#include <iostream.h>
#include <conio.h>
#include <stdio.h>
#include <windows.h>
#include <time.h>

#define sleep Sleep
int main(void)
{

float grav = 9.80;
float mass, acceleration,weight,mew, time,finalvelocity,initialvelocity, speed,gravity, force, torque, forcen, friction, forcep, distance, mass2;
int poop;
int butt;
int finger;
int me;

while(poop)
{

Sleep(5000);

{

int i;

for (i = 0; i < 50; i++)
putchar ('\n');

cout<<endl<<"What would you like to find?"<<endl;
cout<<"(1) Acceleration or Speed"<<endl;
cout<<"(2) Weight or Fw "<<endl;
cout<<"(3) Mass "<<endl;
cout<<"(4) Force "<<endl;
cout<<"(5) Mew and the forces of friction "<<endl;
cout<<"(6) Exit the program"<<endl;

cout<<":";
cin>>poop;

}

{

int i;

for (i = 0; i < 50; i++)
putchar ('\n');

if (poop == 1)
{

cout<<"Which would you like to find?"<<endl;
cout<<"(1) Acceleration "<<endl;
cout<<"(2) Speed "<<endl;
cout<<":";
cin>>butt;

if (butt == 1)
{

cout<<"What is the final velocity in m/s?:";
cin>>finalvelocity;
cout<<endl<<"What is the intial velocity in m/s?:";
cin>>initialvelocity;
cout<<endl<<"What is the elapsed time in seconds?:";
cin>>time;

acceleration = (finalvelocity - initialvelocity)/time;

cout<<"The acceleration is : "<<acceleration;

cout<<" m/s^2"<<endl;
}
}

if (butt == 2)
{

cout<<"Enter the total distance : ";
cin>>distance;
cout<<endl<<"Enter the total time : ";
cin>>time;

speed = distance/time;
cout<<"The speed is : "<<speed;
cout<<" m/s"<<endl;
}

if (poop == 2)
{

cout<<"What is the mass in kilograms?:";
cin>>mass;

weight = mass * grav;
cout<<"The weight in Newtons is: "<<weight<<endl;

}

if (poop == 3)
{

cout<<"What is the weight in newtons?:";
cin>>weight;
mass = weight / grav;
cout<<"The mass of the object in kilograms is: "<<mass<<endl;

}

if (poop == 4)
{

cout<<"Which would you like to do?"<<endl;
cout<<"(1) Force and acceleration on bodies of known weight Force = Fw*a/g"<<endl;
cout<<"(2) Newton's second law of motion Force = ma"<<endl;
cout<<"(3) Law of universal gravitation Force = G*m1*m2/(d)^2"<<endl;
cout<<":";
cin>>finger;

if (finger == 1)
{

cout<<"Enter the weight (Fw):";
cin>>weight;
cout<<endl<<"Enter the acceleration :";
cin>>acceleration;
cout<<endl<<"Enter the force of gravity :";
cin>>gravity;

force = weight*acceleration/gravity;

cout<<"The force is "<<force;
cout<<" newtons"<<endl<<endl<<endl;

}

if(finger == 2)
{

cout<<"Enter the mass :";
cin>>mass;
cout<<endl<<"Enter the acceleration :";
cin>>gravity;

force = mass*acceleration;

cout<<"The force is "<<force;
cout<<" newtowns"<<endl<<endl<<endl;
}

if(finger == 3)
{

cout<<"Enter the gravitational constant :";
cin>>gravity;
cout<<endl<<"Enter the mass of the first body :";
cin>>mass;
cout<<endl<<"Enter the mass of the second body :";
cin>>mass2;
cout<<endl<<"Enter the distance between their centers of mass :";
cin>>distance;
cout<<endl<<endl;

force = gravity*(mass*mass2)/(distance*distance);

cout<<endl<<"The force is "<<force;
cout<<" newtons";

cout<<endl<<endl;
}

}

if (poop == 5)
{

cout<<endl<<"What would you like to do?"<<endl;
cout<<"(1) Find Mew (the coefficient of friction)"<<endl;
cout<<"(2) Find the force of friction "<<endl;
cout<<"(3) Find the normal force "<<endl;
cout<<"(4) dummie"<<endl;
cout<<":";
cin>>me;

if(me == 1)
{

cout<<endl<<"Enter the force of friction :";
cin>>friction;
cout<<endl<<"Enter the normal force :";
cin>>forcen;

mew = friction/forcen;

cout<<endl<<"The coefficient of friction is "<<mew<<endl<<endl;
}

if(me == 2)
{
cout<<endl<<"Enter the coefficient of friction :";
cin>>mew;
cout<<endl<<"Enter the normal force :";
cin>>forcen;

friction = mew*forcen;

cout<<endl<<"The frictional force is "<<friction<<endl<<endl;
}

if(me == 3)
{

cout<<endl<<"Enter the frictional force :";
cin>>friction;
cout<<endl<<"Enter the coefficient of friction :";
cin>>mew;

forcen = friction/mew;

cout<<endl<<"The normal force is "<<forcen;
cout<<" newtons";//it should display answer after this part of the program runs... but it shows it after the screen clears.. and i am not seeing what is causing it. I would like it to loop back to the main option menu after displaying my answer
}
if(me == 4)
{

cout<<endl<<"you are a dummie!!!";

}

}

if(poop == 6)
{

break;
}

}
}

}