Thread: C programming: Trying to have an "atom" bounce off of a jar. Please help!

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Code:

Code:

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
int main()
{
typedef struct
{
 double x, y, z;
 int protons, neutrons, electrons, speed;
}
atom;
void move(atom someatom)
{
someatom.x+=1;
}
int main()
{
//initialize the atom
atom helium;
helium.x = 0;
helium.y = 0;
helium.z = 0;
helium.protons = 2;
helium.neutrons = 2;
helium.electrons = 2;
int time = 0;
double speed = 1;
//move in a straight line 100 units along the x axis
int i;
for (i = 0; i < 100; i+=speed)
{
time++;
move(helium);
printf("time = %d: (%d,%d,%d)", time, helium.x, helium.y, helium.z);
}
//bounce in the box
double dx = 1, dy = 2, dz = 3; // these values represent the velocity vector, change these to speed up or slow down.
while (true)
{
atom.x += dx; //move the atom
atom.y += dy;
atom.z += dz;
if (atom.x > 100 || atom.x < 0) 
{
atom.x -= dx; // move back to before it hit
dx *= -1; // change the direction to bounce
}
if (atom.y > 100 || atom.y < 0) {
atom.y -= dy; // move back to before it hit
dy *= -1; // change the direction to bounce
}
if (atom.z > 100 || atom.z < 0) {
atom.z = dx; // move back to before it hit
dz *= -1; // change the direction to bounce
}
}
return 0;
}

1. My Problems:
2. 
   line 54: atom.x += dx;
   it says: syntax error before '.' token
   line 58: if(atom.x>100|| atom.x<0)
   it says: syntax error before 'atom'
   
   I really appreciate the help since I am in a beginning programming class. I have NEVER coded. I'm sorry if the problems are super obvious and my code is messy, but I would love if you could make my code work for C programming. I'm using the compiler bloodshed. I'm trying to make the 'atom' bounce off the 'jar's' walls in this code. Thank you!!

Thank You, oogabooga!
I have now one simple problem with the code.
It says "syntax error at end of imput" and highlights the last bracket.

Any help is appreciated, and I am sorry if this is not how you update a post.
Please tell me the correct way.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
int main()
{
typedef struct
{
 double x, y, z;
 int protons, neutrons, electrons, speed;
}
atom;
void move(atom *someatom)
{
someatom->x++;
}
int main()
{
//initialize the atom
atom helium;
helium.x = 0;
helium.y = 0;
helium.z = 0;
helium.protons = 2;
helium.neutrons = 2;
helium.electrons = 2;
int time = 0;
double speed = 1;
//move in a straight line 100 units along the x axis
int i;
for (i = 0; i < 100; i+=speed)
{
time++;
move(&helium);
printf("time = %d: (%d,%d,%d)", time, helium.x, helium.y, helium.z);
}
//bounce in the box
double dx = 1, dy = 2, dz = 3; // these values represent the velocity vector, change these to speed up or slow down.
while (true)
{
helium.x += dx; //move the atom
helium.y += dy;
helium.z += dz;
if (helium.x > 100 || helium.x < 0)
{
helium.x -= dx; // move back to before it hit
dx *= -1; // change the direction to bounce
}
if (helium.y > 100 || helium.y < 0)
{
helium.y -= dy; // move back to before it hit
dy *= -1; // change the direction to bounce
}
if (helium.z > 100 || helium.z < 0)
{
helium.z = dx; // move back to before it hit
dz *= -1; // change the direction to bounce
}
}
system("PAUSE")
return 0;
}