C++ Tutorial/Structure/return structure

Return structure from a function

<source lang="cpp">#include <cmath>

1. include <iostream>

using namespace std; // define the structures struct DataStructure {

 float radius;
 double angle;

}; struct ResultStructure {

 float area;
 double sine;
 double cosine;
 double tangent;

}; ResultStructure compute(struct DataStructure mystruct); int main () {

   DataStructure input;
      ResultStructure output;
      input.radius = 3;
      input.angle = 0.8;
      output = compute(input);
   cout << " The area is "<< output.area << "\n";
      cout << " The sine of the angle is " << output.sine << "\n";
      cout << " The cosine of the angle is " << output.cosine << "\n";
   cout << " The tangent of the angle is " << output.tangent << "\n";
      return 0;

} ResultStructure compute(struct DataStructure mystruct) {

    ResultStructure answer;
       answer.area = pow(mystruct.radius,2);
       answer.sine = sin(mystruct.angle);
       answer.cosine = cos(mystruct.angle);
       answer.tangent = tan(mystruct.angle);
       return answer;

};</source>

The area is 9
 The sine of the angle is 0.717356
 The cosine of the angle is 0.696707
 The tangent of the angle is 1.02964