不要input, 用两组样本数据求出第五题的代码
时间: 2024-10-20 15:08:13 浏览: 5
好的,以下是使用两组样本数据来解决第五题(解2×2线性方程组)的代码示例:
### 代码实现
```cpp
#include <iostream>
using namespace std;
// 定义解方程的函数
void solveEquation(double a, double b, double c, double d, double e, double f, double& x, double& y, bool& isSolvable) {
double determinant = a * d - b * c;
if (determinant == 0) {
isSolvable = false;
} else {
isSolvable = true;
x = (e * d - b * f) / determinant;
y = (a * f - e * c) / determinant;
}
}
int main() {
double x, y;
bool isSolvable;
// 第一组样本数据
double a1 = 9.0, b1 = 4.0, c1 = 3.0, d1 = -5.0, e1 = -6.0, f1 = -21.0;
solveEquation(a1, b1, c1, d1, e1, f1, x, y, isSolvable);
if (isSolvable) {
cout << "First set of equations: x is " << x << " and y is " << y << endl;
} else {
cout << "First set of equations: The equation has no solution." << endl;
}
// 第二组样本数据
double a2 = 1.0, b2 = 2.0, c2 = 2.0, d2 = 4.0, e2 = 4.0, f2 = 5.0;
solveEquation(a2, b2, c2, d2, e2, f2, x, y, isSolvable);
if (isSolvable) {
cout << "Second set of equations: x is " << x << " and y is " << y << endl;
} else {
cout << "Second set of equations: The equation has no solution." << endl;
}
return 0;
}
```
### 运行结果
运行上述代码将输出以下结果:
```
First set of equations: x is -2 and y is 3
Second set of equations: The equation has no solution.
```
### 解释
1. **第一组样本数据**:
- 输入:`a = 9.0`, `b = 4.0`, `c = 3.0`, `d = -5.0`, `e = -6.0`, `f = -21.0`
- 输出:`x = -2.0`, `y = 3.0`
2. **第二组样本数据**:
- 输入:`a = 1.0`, `b = 2.0`, `c = 2.0`, `d = 4.0`, `e = 4.0`, `f = 5.0`
- 输出:方程无解
这个代码实现了题目要求的功能,并且使用了两组样本数据进行测试。希望这对你有帮助!
阅读全文