Thread: Nested Loops

I am in dire need of figuring out how to run this program using nested loops. It's a Van der Waal equation assignment, but I need to use nested loops for incremental increases. Here's what I have so far.

Code:

#include <iostream>
#include <iomanip>
#include <stdio.h>
using namespace std;
          
// Define constants.

#define a 3.952
#define b 0.0427
#define R 0.08206
#define mL_L .001

int main ()
{
    float moles;            //IN: Number of moles of CO2 (n).
    float temp;                //IN: Temperature (K).
    float initial;            //IN: Initial volume (mL).    
    float final;            //IN: Final volume (mL).
    float increment;        //IN: Increment volume (mL) b/w lines of the table.
    float pressure;            //OUT: Pressure (atm).
    float loopVol;            //Variable assignment for loop function.
    float volume;            //Variable assignment for calculations.
    
    //Request user input.
    
    cout << "\nEnter the quantity of Carbon Dioxide (moles): ";
    cin >> moles;
    cout << "\nEnter the Temperature (K): ";
    cin >> temp;
    cout << "\nEnter the Initial Volume (mL): ";
    cin >> initial;
    cout << "\nEnter the Final Volume (mL): ";
    cin >> final;
    cout << "\nEnter the Volume Increment (mL): ";
    cin >> increment;
    
    //Set for table.
    
    cout << "\n\nVolume (mL)                    Pressure (atm)" << endl;
    
    //Begin calculations.
    
        for(loopVol = initial; loopVol <= final; loopVol += increment)
            {
            printf("  %.2f", loopVol);
            volume = loopVol * mL_L;
            pressure = (moles * R * temp)/(volume - b * moles) - (a * moles * moles)/(volume * volume);
        
            printf("                             %.4f",pressure);        
            } while (loopVol <= final);
        
        return 0;
}

Yes, I posted that, too. But, as you'd notice, they weren't able to help :/.