解法一、克拉瑪公式

🔹 克拉瑪公式

$\left\{\begin{matrix} ax + by = c \\ dx + ey = f \end{matrix}\right.$

$\Delta = \begin{vmatrix} a & b \\ d & e \\ \end{vmatrix},\;\; \Delta x = \begin{vmatrix} c & b \\ f & e \\ \end{vmatrix},\;\; \Delta y = \begin{vmatrix} a & c \\ d & f \\ \end{vmatrix}$

$x = \frac{\Delta x}{\Delta},\;\; y = \frac{\Delta y}{\Delta}$

✅ 完整代碼

評分結果(參考) ： AC (2ms, 340KB)

#include <bits/stdc++.h>
using namespace std;

int main(){
    cin.tie(nullptr);
    
    double a, b, c, d, e, f;
    cin >> a >> b >> c >> d >> e >> f;
    
    double deltaX = c*e - b*f;
    double deltaY = a*f - c*d;
    double delta  = a*e - b*d;
    
    if(delta==0 && deltaX==0 && deltaY==0) printf("Too many");
    else if(delta == 0) printf("No answer");
    
    else{
        double x = deltaX/delta;
        double y = deltaY/delta;

        printf("x=%.2f\ny=%.2f", x, y);
    }
    
    return 0;
}