example1-7.cpp

来自「关于书籍《Borland c++Builder工程实践》的源代码」· C++ 代码 · 共 23 行

#include <iostream.h>
#include <math.h>
void main()
{
double sin(double),cos(double),tan(double);
void function1(double y,double(*f)(double));
int angle;
cout<<"Please input a angle:";
cin>>angle;
double pi=3.1416;
double x=pi/180*angle;
cout<<"sin("<<angle<<")=";
function1(x,sin);
cout<<"cos("<<angle<<")=";
function1(x,cos);
cout<<"tan("<<angle<<")=";
function1(x,tan);
}
void function1(double y,double(*f)(double))
{
cout<<(*f)(y)<<endl;
}