极坐标转换为直角坐标

#include <iostream>
#include <cmath>
using namespace std;
void trans1(float,float,float&,float&);
void main()
{
 float r,theta,x,y;
 cin>>r>>theta;
 trans1(r,theta,x,y);
 cout<<x<<"  "<<y<<endl;
}
void trans1(float r,float theta,float&x,float&y)
{
 x=r*cos(theta);
 y=r*sin(theta);
}