#include <iostream>
#include <stdio.h>
#include <math.h>
#include <cstdlib>
#include "input.h"
{
    
    const float a1 =  0.254829592;
    const float a2 = -0.284496736;
    const float a3 =  1.421413741;
    const float a4 = -1.453152027;
    const float a5 =  1.061405429;
    const float p  =  0.3275911;
    const float sqrt2 = 
sqrt(2.0);
     
    
    array t = 1.0f / (1.0f + p*x);
     array y = 1.0f + 0.5f * (((((a5*t + a4)*t) + a3)*t + a2)*t + a1)*t*
exp(-x*x);
     return xSign * y + !xSign * (1 - y); 
}
{
    
    
    
    
    
    
    
    d1 = d1 + (R + (V*V)*0.5) * T;
    C = S * cnd_d1  - (X * 
exp((-R)*T) * cnd_d2);
    P = X * 
exp((-R)*T) * (1 - cnd_d2) - (S * (1 - cnd_d1));
}
int main(int argc, char **argv)
{
    try {
        int device = argc > 1 ? atoi(argv[1]) : 0;
        printf("** ArrayFire Black-Scholes Example **\n"
               "**          by AccelerEyes         **\n\n");
        
        
        
        black_scholes(Cg, Pg, Sg,Xg,Rg,Vg,Tg);
        printf("Warming up done\n");
        int iter = 1000;
        for (int n = 50; n <= 500; n += 50) {
            
            
            for (int i = 0; i < iter; i++) {
                black_scholes(Cg, Pg, Sg,Xg,Rg,Vg,Tg);
            }
            printf("Input Data Size = %8d. Mean GPU Time: %0.6f ms\n", (int)dims[0], 1000 * t);
        }
        fprintf(stderr, 
"%s\n", e.
what());
        throw;
    }
    return 0;
}