homework giving difficulty

I am working on my homework code. I am having difficulty organizing. I just need the right functions(calling them is easy).
And I don't know how to print out a table that is asked for(we go way fast in this class, I don't know why).

here is the link for all that I have to do, it isn' t so much because they tell you what to do.

http://www.engineering.uiowa.edu/~ci...ll02/hw02.html

here is my code anyways. the last function is supposed to print out a table, max of 50 stars(b/c voltage max);

Code:

lude <stdio.h>


float read_positive(void);
float calc_tau(float r, float c);
float calc_v_of_t(float v, float tua, float t);
void print_bar(float value, float max);


int main()
{
float voltage, resistance, capacitance;

printf( "please put in the voltage source voltage, units of volts" );
scanf( "%f", &voltage );

printf( "please put in the resistor resistance, in ohms units" );
scanf( "%f", &resistance );

printf( "please put in the capacitance" );
scanf( "%f", %capacitance );



return 0;
}



float read_positive(void)
{

printf( "Please put in a real number" );
scanf( "%d", &r );

return r;
}


float calc_tau(float r, float c)
{ float r, c, tau;
printf( "please put in your resistor resistance in units of kiloohms
for an accurate answer" );
scanf( "%f", &r );
printf( "please put in your capacitance in units of micofarads for
an accurate answer" );
scanf( "%f", &c );
tau = r * c;
return tau;
}


float calc_v_of_t(float v, float tua, float t)
{

printf( "and please put in the time for the circuit to run as a
closed circuit, units of seconds" );
scanf( "%f", t);
v = v - v*(e^(-t/tau);
return v;
}


void print_bar(float value, float max)
{
}

I talked to my TA about it, but they sometimes don't make any sense. they communicate different, sometimes they do though.

void print_bar(float value, float max) is supposed to print that table like:

Time Voltage
-------------------------
0.00000 0.00000
1.00000 3.83796 *******
2.00000 7.08672 **************
3.00000 9.83673 *******************
4.00000 12.16457 ************************
5.00000 14.13504 ****************************
6.00000 15.80301 *******************************
(and so on

and this is very rough draft, I know I need to declare variables and all. I just have trouble conceptually at times, and then putting what I understand into the code. I understand I will need a "while" loop in my main() code, merely because I saw someone do it.

You should run a LOOP to deal with time;
Ex:

Code:

  if (starTime > endTime)
     cout>>"Invalid time range!";

  While (startTime <= endTime)
        {
          /* call those functions to perform
             calculation here*/
           
        startTime++;  /*increment time*/  
          
        }

[code tags added by ygfperson]
Hope you get an idea!
C-Dumbie

From homework link:
CIE Fall 2002 Homework #2
Transient Circuit Analyzer
Due Date: September 13, 2002, 5:00 pm Central Daylight Time

Nothing like getting an early start on the old homework assignment!

hey, I started on Wednesday! But my knowledge is not that good so I am stuck.

Still as the saying goes...

Procrastination on your part does not constitute an emergency on ours..

Where are your function calls in main??
Mr. C.