#include<iostream> using namespace std; #define pi 3.1415926 struct coord { double x; double y; }; double cot(double a); double DmsToRad(double Dms); coord For_Insec(double xA, double yA, double xB, double yB, double alfa, double beta, double a); int main() { double a; cout << "请申明坐标编号注记方式(逆时针为1,顺时针0:"; cin >> a; cout << endl; double x1, y1, x2, y2, alfa, beta; cout << "请输入已知坐标点A的x,y坐标:"; cin >> x1 >> y1; cout << endl; cout << "请输入已知坐标点B的x,y坐标:"; cin >> x2 >> y2; cout << endl; cout << "请输入测量角度α和β:"; cin >> alfa >> beta; coord p; p = For_Insec(x1, y1, x2, y2, alfa, beta, a); cout << endl; cout << "待定点P的坐标xp=" << p.x << " ,y=" << p.y; return 0; } double cot(double a)//cot三角函数 { return cos(a) / sin(a); } double DmsToRad(double Dms)//角度转换函数 { int i_Deg = (int)Dms; double temp = (Dms - i_Deg) * 100; int i_Min = (int)temp; double sec = (temp - i_Min) * 100; double Rad = (i_Deg + i_Min / 60.0 + sec / 3600)*pi / 180; return Rad; } coord For_Insec(double xA, double yA, double xB, double yB, double alfa, double beta, double a) { alfa = DmsToRad(alfa); beta = DmsToRad(beta); coord p; if (a)//逆时针注记 { p.x = (xA*cot(beta) + xB*cot(alfa) + (yB - yA)) / (cot(alfa) + cot(beta)); p.y = (yA*cot(beta) + yB*cot(alfa) + (xA - xB)) / (cot(alfa) + cot(beta)); } else { p.x = (xA*cot(beta) + xB*cot(alfa) + (yA - yB)) / (cot(alfa) + cot(beta)); p.y = (yA*cot(beta) + yB*cot(alfa) + (xB - xA)) / (cot(alfa) + cot(beta)); } return p; }优化上面代码
时间: 2024-01-20 09:02:04 浏览: 32
这段代码实现的功能是计算两条直线的交点坐标。以下是我对这段代码的一些优化建议:
1. 不使用#define定义常量pi,可以使用const关键字定义一个常量pi,更加安全可靠。
2. 可以将角度转换函数DmsToRad()中的计算过程简化为一行代码,使代码更加简洁易懂。
3. 可以将For_Insec()函数中的if-else语句合并为一行三目运算符,使代码更加简洁。
4. 可以在函数定义时添加const关键字,表示该函数不会修改函数外部的变量,更加安全可靠。
优化后的代码如下:
```cpp
#include<iostream>
using namespace std;
const double pi = 3.1415926;
struct coord {
double x;
double y;
};
double cot(double a);
double DmsToRad(double Dms);
coord For_Insec(const double xA, const double yA, const double xB, const double yB, const double alfa, const double beta, const double a);
int main() {
double a;
cout << "请申明坐标编号注记方式(逆时针为1,顺时针0:";
cin >> a;
cout << endl;
double x1, y1, x2, y2, alfa, beta;
cout << "请输入已知坐标点A的x,y坐标:";
cin >> x1 >> y1;
cout << endl;
cout << "请输入已知坐标点B的x,y坐标:";
cin >> x2 >> y2;
cout << endl;
cout << "请输入测量角度α和β:";
cin >> alfa >> beta;
coord p;
p = For_Insec(x1, y1, x2, y2, alfa, beta, a);
cout << endl;
cout << "待定点P的坐标xp=" << p.x << " ,y=" << p.y;
return 0;
}
double cot(double a) {//cot三角函数
return cos(a) / sin(a);
}
double DmsToRad(const double Dms) {//角度转换函数
return Dms * pi / 180.0;
}
coord For_Insec(const double xA, const double yA, const double xB, const double yB, const double alfa, const double beta, const double a) {
coord p;
double cot_alfa = cot(DmsToRad(alfa));
double cot_beta = cot(DmsToRad(beta));
p.x = (xA * cot_beta + xB * cot_alfa + ((a) ? (yB - yA) : (yA - yB))) / (cot_alfa + cot_beta);
p.y = (yA * cot_beta + yB * cot_alfa + ((a) ? (xA - xB) : (xB - xA))) / (cot_alfa + cot_beta);
return p;
}
```