So, i am trying to get this code to work....... but for all four of my functions it says that the "function does not take 1 arguement" for the all 4 of the functions some of them say "function doesn not take 3 arguements" but i dont know what it means put can someone help me get this code right please please let me know if you need more information

#include "stdafx.h"

#include

using namespace std;

float getSalesAmt(float a); // function proto

float calcCommision(float a, float b, double c, double d); // function proto

float calcPay(float b, int e, float f); // function proto

float displayPay(float a, float b, int e, float f); // function proto

int main()

{

float monthlySales = 0; // A

float commision = 0; // B

double onehalf = 0.015; //C // this is the percentage for the commision when sales are between 25000 and 50000

double two = 0.02; //D // this is the percentage for commision when sales are over 50000

int basePay = 2500; // E

float totalPay = 0; //F

getSalesAmt(monthlySales);

calcCommision(monthlySales, commision, onehalf, two);

calcPay(commision, basePay, totalPay);

displayPay(monthlySales, commision, basePay, totalPay);

return 0;

}

float getSalesAmt(float a)

{

cout << "Enter the monthly sales amount: ";

cin >> a;

return 0;

}

float calcCommision(float a, float b, double c, double d)

{

if(a > 50000)

{

b = a * c;

}

if (a > 25000 && a < 50000)

{

b = a * d;

}

if (a < 25000)

{

b = 0;

}

return b;

}

float calcPay(float b, int e, float f)

{

f = b + e;

}

float displayPay(float a, float b, int e, float f)

{

cout << "Monthly Sales: $" << a << " ";

cout << "Commission: $" << b << " ";

cout << "Base Pay: $" << e << " ";

cout << "Total Pay: $" << f << " ";

}