怎么用指针写函数Result( ),其功能是对传来的两个浮点数求出和值和差值,并通过形参传送回调用函数中,

C++的写法、、
#include
using namespace std;
float Result(float *a,float *b)
{
float sum,nec;
sum = *a + *b;
nec = *a - *b;
*a = sum;
*b = nec;
return 0;
}
int main()
{
float x,y;
cin>>x>>y;
Result(&x,&y);
cout