// console2.cpp : Defines the entry point for the console application.
//

#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <time.h>

double (*pfn[3])(double);
char *fNames[3] = { "Cos", "Sin", "Tan" };

int main(int argc, char* argv[])
{
	printf("**** Dynamic Binding *****!\n\n");

    const double PI = 3.1415926;
    double result = 0.0;
    double angle = 45.0;
    double arg = ( angle/180.)*PI;

    pfn[0] = cos;
    pfn[1] = sin;
    pfn[2] = tan;

    srand( time(NULL) );

    for ( int j=0; j<10; j++)
    {
        int i = rand() % 3;

        // **** Dynamic Binding ****
        // What function is called is NOT determined until
        // run time!
        result = pfn[i]( arg );

        printf("I = %d, %s(%.2f) = %.4f\n", 
                 i, fNames[i], angle, result );
    }

	return 0;
}