double(a)和（double）a有区别吗?而且在visual c++ 6.0上两个效果一样,都可以强制转化类型

有句C语言看不懂double f (double a, double b, double c,double d, double x) 在C++种,关于指针的这两种表示有什么区别：double * a和double ** 以下函数定义中正确的是 （）以下函数定义中正确的是 （） .A.double fun(double x,double y){ } B.double fun(double x;double y){ }C.double fun(double x,double y);{ } D.double fun(double x,y){ }A.double fun(double x,double y){ } B #includeusing namespace std;#define PI 314159double area(double radius=0);double area(double a,double b);double area(double a,double b,double h);double area(double a,double b,double c,int);int main(){cout double room和 a room for two有区别吗? double *p,a; *p double(a)和（double）a有区别吗?而且在visual c++ 6.0上两个效果一样,都可以强制转化类型 求高手帮我看看程序.是求一元方程的根.用牛顿法和二分法的!有哪些错误#include#include#include#includeint n,i,k;int a[50];double function(double x);double dfunction(double x);double diedai(double x0,int *n,double jingdu);dou 用C++求解一元二次方程的程序有什么错误?//解一元二次方程的C++程序#include #include #include double sqrt1(double,double); double sqrt2(double,double); double printer(double,double);void main() { float a,b,c; double x1,x2; cou 编一个类,有个方法double area (double a double b double c);求面积用海伦公式,再编个主类来调用该方法 operator=是什么意思啊# include double sum(double a,double b);double subtract(double a,double b);double divide(double a,double b);double multiply(double a,double b);main(){int choice;char operator;double a,b;double (*func)();printf( * * * * * double double double double double double double