overloading two class member functions : member method « Class « C++ Tutorial

1. C++ Tutorial
2. Class
3. member method

#include <iostream>
#include <math.h>
#include <string>
using namespace std;

const double DEG_TO_RAD=0.0174532925;
  
class trigonometric {
 double angle;
 double answer_sine;
 double answer_cosine;
 double answer_tangent;

public:
 void trig_calc(double);
 void trig_calc(char *);
};

void trigonometric::trig_calc(double degrees)
{
 angle=degrees;
 answer_sine=sin(angle * DEG_TO_RAD);
 answer_cosine=cos(angle * DEG_TO_RAD);
 answer_tangent=tan(angle * DEG_TO_RAD);
 cout << "\nFor an angle of " << angle << " degrees." << endl;
 cout << "The sine is " << answer_sine << endl;
 cout << "The cosine is " << answer_cosine << endl;
 cout << "The tangent is " << answer_tangent << endl;
}
  
void trigonometric::trig_calc(char *dat)
{
 char *deg,*min,*sec;

 deg=strtok(dat,"d ");  
 min=strtok(0,"m ");
 sec=strtok(0,"s");
 angle=atof(deg)+((atof(min))/60.0)+((atof(sec))/360.0);
 answer_sine=sin(angle * DEG_TO_RAD);
 answer_cosine=cos(angle * DEG_TO_RAD);
 answer_tangent=tan(angle * DEG_TO_RAD);
 cout << "\nFor an angle of " << angle << " degrees." << endl;
 cout << "The sine is " << answer_sine << endl;
 cout << "The cosine is " << answer_cosine << endl;
 cout << "The tangent is " << answer_tangent << endl;
}

main()
{
 trigonometric data;

 data.trig_calc(75.0);
  
 char str1[] = "35d 75m 20s";
 data.trig_calc(str1);
 
 data.trig_calc(145.72);

 char str2[] = "65d 45m 30s";
 data.trig_calc(str2);
 
 return (0);
}