e_calc.cpp

#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
#include <vector>
using namespace std;

// for Schmitt Trigger
float   VRef                =   0.0;
float   Ra                  =   0;	//Resistor between T1 & T2
float   Rb                  =   0;	//Resistor between Ra & GND
float   R1                  =   0;	//Resistor between T1 Collector and VCC
float	Re		    =   0;	//Resistor between Emitter of T1 and Ground
float   Voltage             =   0.0;    //used for impedance & current
float   Voltage2            =   0.0;
float   c1                  =   0.0;    //capacitance 1
float   c2                  =   0.0;    //capacitance 2
float   r2                  =   0.0;    //resistance 2

// for parallel resistance
vector<float>   resistors;
int     nOfRes              =   0;
float   overallResistance   =   0.0;

// for impedance
float   resistance          =   0.0;    //used for current as well
float   impedance           =   0.0;    //used for current as well

//for power
float   watts               =   0.0;

//for current density
float   crosssection        =   0.0;

string  helpstring          =   "-a, -A, -I, -i\t\tCalculate Impedance in Amperes\n-C, -c, -V, -v\t\tCalculate Current in Volts\n-J, -j\t\t\tCalculate Current Density\n-P, -p\t\t\tCalculate Power in Watts\n-R, -r\t\t\tCalculate Resistance in Ohms\n-RP, -rp\t\tCalculate Parallel Resistance\n-s, -S\t\t\tSchmitt Trigger\n-tmv, -TMV\t\tAstable Transistor Multivibrator\nUse -h -[command] for further info";
string  schmittstring       =   "SCHMITT TRIGGER RESISTOR CALC\nExpects 5 values:\tVRef (prob = VCC)\n\t\t\tRa (between T1 & T2)\n\t\t\tRb (between Ra & GND)\n\t\t\tRe (between T1 & GND)\n\t\t\tR1 (between VCC & T1)";
string  impedancestring     =   "IMPEDANCE IN AMPERE CALC\nExpects 2 values:\nCurrent in Volts, Resistance in Ohms";
string  voltagestring       =   "CURRENT IN VOLTS CALC\nExpects 2 values:\nImpedance in Amperes, Resistance in Ohms";
string  resistancestring    =   "RESISTANCE IN OHMS\nExpects 2 values:\nCurrent in Volts, Impedance in Amperes";
string  parallelstring      =   "PARALLEL RESISTANCE IN OHMS\nExpects n values:\nResistance 1 in Ohms, Resistance 2 in Ohms, ...";
string  wattstring          =   "POWER IN WATTS\nExpects 2 values:\nCurrent in Voltage, Impedance in Amperes";
string  densitystring       =   "CURRENT DENSITY\nExpects 2 values:\nCross-Sectional Area in mm^2, Impedance in Amperes";
string  vibratorstring      =   "ASTABLE TRANSISTOR MULTIVIBRATOR\nExpects 2 or 4 values:\nResistance 1 [& 2] in Ohms, Capacitance [& 2] in Farad";

float calcVoltage1() {
	// high trigger level
    return (((VRef*Rb)/(R1+Ra+Rb))-0.61);
}

float calcVoltage2() {
	// low trigger level
    return (((VRef*Rb)/(R1+Ra+Rb+(R1*Rb)/Re))+0.61);
}

float calcParallelResistance(int length) {
    float   multiply    =   resistors.at(0);
    float   additive    =   resistors.at(0);
    if(length <= 1) {
        cout << "Needs 2 resistors minimum!" << endl;
        exit(0);
    } else if(length == 2) { 
        multiply    =   multiply * resistors.at(1);
        additive    +=  resistors.at(1);

        return (multiply/additive);
    } else if(length > 2) {
        additive    =   0;
        for(int i=0; i<length; i++) {
            additive    +=  (1/resistors.at(i));
        }

        return 1/additive;
    }

    return (multiply/additive);
}

float calcResistance() {
    return (Voltage/impedance);
}

float calcImpedance() {
    return (Voltage/resistance);
}

float calcCurrent() {
    return (impedance * resistance);
}

float calcPower() {
    return (Voltage * impedance);
}

float calcVibratorFrequency(int n) {
    float   f1  =   0.0;
    float   f2  =   0.0;
    if(n == 2) {
        f1      =   1/(1.38 * R1 * c1);
        return f1;
    } else if(n == 4) {
        f2      =   1/(1.38 * r2 * c2);
        return f2;
    }
    return 0;
}

float calcCurrentDensity() {
    return (impedance/(crosssection));
}

void printResults(int type) {
    /*
    0 - Schmitt Trigger
    1 - Resistance Parallel
    2 - Resistance
    3 - Current
    4 - Impedance
    5 - Watts
    6 - Current Density
    7 - single frequency
    8 - dual frequency
    */
   if(type == 0) {
        cout << "High Trigger Voltage: " << setprecision(4) << Voltage << endl;
        cout << "Low Trigger Voltage: " << setprecision(4) << Voltage2 << endl;
   } else if(type == 1) {
       cout << "Parallel Resistance: " << setprecision(2) << overallResistance << endl;
   } else if(type == 2) {
       cout << "Resistance in Ohms: " << setprecision(2) << resistance << endl;
   } else if(type == 3) {
       cout << "Current in Volts: " << setprecision(4) << Voltage << endl;
   } else if(type == 4) {
       cout << "Impedance in Ampere: " << setprecision(6) << impedance << endl;
   } else if(type == 5) {
       cout << "Power in Watts: " << setprecision(2) << watts << endl;
   } else if(type == 6) {
       cout << "Current Density in A/mm^2: " << setprecision(4) << watts << endl;
       if(watts > 25) {
           cout << "That's way too high." << endl;
       } else if(watts <= 25 && watts > 18) {
           cout << "That's quite high. Maybe a thicker wire?" << endl;
       } else if(watts <= 18 && watts > 5) {
           cout << "That's okay." << endl;
       } else if(watts <= 5) {
           cout << "There's plenty of room. You could try a thinner wire." << endl;
       }
   } else if(type == 7) {
       cout << "Synchronized Vibration\nOscillation in Hertz: " << setprecision(4) << Voltage << endl;
   } else if(type == 8) {
       cout << "Asynchrononous Vibration\nOscillation 1 in Hertz: " << setprecision(4) << Voltage << endl << "Oscillation 2 in Hertz: " << setprecision(4) << Voltage2 << endl;
   }
}

int main(int argc, char *argv[]) {
    if(argc > 1) {
        if(strncmp(argv[1], "-h", 2) == 0 || strncmp(argv[1], "-help", 5) == 0 || strncmp(argv[1], "--h", 3) == 0 || strncmp(argv[1], "--help", 6) == 0) {
            if(argc > 2) {
                if(strncmp(argv[2], "-s", 2) == 0 || strncmp(argv[2], "-S", 2) == 0) {
                    cout << schmittstring << endl;
                } else if(strncmp(argv[2], "-RP", 3) == 0 || strncmp(argv[2], "-rp", 3) == 0) {
                    cout << parallelstring << endl;
                } else if(strncmp(argv[2], "-r", 2) == 0 || strncmp(argv[2], "-R", 2) == 0) {
                    cout << resistancestring << endl;
                } else if(strncmp(argv[2], "-v", 2) == 0 || strncmp(argv[2], "-V", 2) == 0 || strncmp(argv[2], "-c", 2) == 0 || strncmp(argv[2], "-C", 2) == 0) {
                    cout << voltagestring << endl;
                } else if(strncmp(argv[2], "-i", 2) == 0 || strncmp(argv[2], "-I", 2) == 0 || strncmp(argv[2], "-a", 2) == 0 || strncmp(argv[2], "-A", 2) == 0) {
                    cout << impedancestring << endl;
                } else if(strncmp(argv[2], "-p", 2) == 0 || strncmp(argv[2], "-P", 2) == 0) {
                    cout << wattstring << endl;
                } else if(strncmp(argv[2], "-j", 2) == 0 || strncmp(argv[2], "-J", 2) == 0) {
                    cout << densitystring << endl;
                } else if(strncmp(argv[2], "-tmv", 4) == 0 || strncmp(argv[2], "-TMV", 4) == 0) {
                    cout << vibratorstring << endl;
                }
            } else {
                cout << helpstring << endl;
            }
            exit(1);
        } else if(strncmp(argv[1], "-s", 2) == 0 || strncmp(argv[1], "-S", 2) == 0) {
            if(argc > 2) {
                VRef    =   stof(argv[2]);
                Ra      =   stof(argv[3]);
                Rb      =   stof(argv[4]);
                Re      =   stof(argv[5]);
		R1	=   stof(argv[6]);
            } else {
                cout << "VRef?" << endl << "> ";
                cin >> VRef;
                cout << "Ra (between T1 & T2)?" << endl << "> ";
                cin >> Ra;
                cout << "Rb (between Ra & GND)?" << endl << "> ";
                cin >> Rb;
		cout << "Re (between T1 & GND)?" << endl << "> ";
		cin >> Re;
                cout << "R1 (between VRef & T1)?" << endl << "> ";
                cin >> R1;
            }
            Voltage         =   calcVoltage1();
            Voltage2        =   calcVoltage2();
            printResults(0);
        } else if(strncmp(argv[1], "-rp", 3) == 0 || strncmp(argv[1], "-RP", 3) == 0) {
            if(argc > 2) {
                for(int i=2; i<argc; i++) {
                    resistors.push_back(stof(argv[i]));
                }
            overallResistance   =   calcParallelResistance(argc-2);
            } else {
                cout << "How many Resistors are there?" << endl << "> ";
                cin >> nOfRes;
                if(nOfRes < 2) {
                    cout << "Needs 2 resistors minimum!" << endl;
                    exit(0);
                }
                for(int i=0; i<nOfRes; i++) {
                    float   in  =   0;
                    cout << "Value of Resistor " << i+1 << "?" << endl << "> ";
                    cin >> in;
                    resistors.push_back(in);
                }
            overallResistance   =   calcParallelResistance(nOfRes);
            }
            printResults(1);
        } else if(strncmp(argv[1], "-r", 2) == 0 || strncmp(argv[1], "-R", 2) == 0) {
            if(argc > 2) {
                Voltage     =   stof(argv[2]);
                impedance   =   stof(argv[3]);
            } else {
                cout << "Calculating Resistance in Ohms" << endl;
                cout << "Current/Volts?" << endl << "> ";
                cin >> Voltage;
                cout << "Impedance/Ampere?" << endl << "> ";
                cin >> impedance;
            }
            resistance  =   calcResistance();
            printResults(2);
        } else if(strncmp(argv[1], "-v", 2) == 0 || strncmp(argv[1], "-V", 2) == 0 || strncmp(argv[1], "-c", 2) == 0 || strncmp(argv[1], "-C", 2) == 0) {
            if(argc > 2) {
                impedance   =   stof(argv[2]);
                resistance  =   stof(argv[3]);
            } else {
                cout << "Calculating Current in Volts" << endl;
                cout << "Impedance/Ampere?" << endl << "> ";
                cin >> impedance;
                cout << "Resistance?" << endl << "> ";
                cin >> resistance;
            }
            Voltage =   calcCurrent();
            printResults(3);
        } else if(strncmp(argv[1], "-i", 2) == 0 || strncmp(argv[1], "-I", 2) == 0 || strncmp(argv[1], "-a", 2) == 0 || strncmp(argv[1], "-A", 2) == 0) {
            if(argc > 2) {
                Voltage     =   stof(argv[2]);
                resistance  =   stof(argv[3]);
            } else {
                cout << "Calculating Impedance in Ampere" << endl;
                cout << "Current/Volts?" << endl << "> ";
                cin >> Voltage;
                cout << "Resistance?" << endl << "> ";
                cin >> resistance;
            }
            impedance   =   calcImpedance();
            printResults(4);
        } else if(strncmp(argv[1], "-P", 2) == 0 || strncmp(argv[1], "-p", 2) == 0) {
            if(argc > 2) {
                Voltage     =   stof(argv[2]);
                impedance   =   stof(argv[3]);
            } else {
                cout << "Calculating power in Watts" << endl;
                cout << "Current/Volts?" << endl << "> ";
                cin >> Voltage;
                cout << "Impedance/Amperes?" << endl << "> ";
                cin >> impedance;
            }
            watts           =   calcPower();
            printResults(5);
        } else if(strncmp(argv[1], "-J", 2) == 0 || strncmp(argv[1], "-j", 2) == 0) {
            if(argc > 2) {
                crosssection    =   stof(argv[2]);
                impedance       =   stof(argv[3]);
            } else {
                cout << "Calculating current density" << endl;
                cout << "Cross-Section Area of the wire in mm^2?" << endl << "> ";
                cin >> crosssection;
                cout << "Impedance/Amperes?" << endl << "> ";
                cin >> impedance;
            }
            watts           =   calcCurrentDensity();
            printResults(6);
        } else if(strncmp(argv[1], "-tmv", 4) == 0 || strncmp(argv[1], "-TMV", 4) == 0) {
            if(argc > 2) {
                if(argc < 5) {
                    R1      =   stof(argv[2]);
                    c1      =   stof(argv[3]);
                    Voltage =   calcVibratorFrequency(2);
                    printResults(7);
                } else if(argc > 4) {
                    R1          =   stof(argv[2]);
                    c1          =   stof(argv[3]);
                    r2          =   stof(argv[4]);
                    c2          =   stof(argv[5]);
                    Voltage     =   calcVibratorFrequency(2);
                    Voltage2    =   calcVibratorFrequency(4);
                    printResults(8);
                }
            } else {
                int local;
                cout << "Calculating Oscillation Frequency" << endl;
                cout << "Is the oscillation synchronous (0/1)" << endl;
                cin >> local;
                if(local == 1) {
                    cout << "Resistance in Ohms?" << endl << "> ";
                    cin >> R1;
                    cout << "Capacitance in Farads?" << endl << "> ";
                    cin >> c1;
                    Voltage     =   calcVibratorFrequency(2);
                    printResults(7);
                } else {
                    cout << "Asynchrononous Oscillation" << endl << "Resistance 1 in Ohms?" << endl << "> ";
                    cin >> R1;
                    cout << "Capacitance 1 in Farads?" << endl << "> ";
                    cin >> c1;
                    cout << "Resistance 2 in Ohms?" << endl << "> ";
                    cin >> r2;
                    cout << "Capacitance 2 in Farads?" << endl << "> ";
                    cin >> c2;
                    Voltage     =   calcVibratorFrequency(2);
                    Voltage2    =   calcVibratorFrequency(4);
                    printResults(8);
                }
            }
        }
    } else {
        cout << helpstring << endl;
    }

    exit(1);
}