C++解一元一次方程：包含未知数系数和常数项

#include "iostream"\n\nint main() {\n double a, b; // 系数和常数项\n std::cout << "请输入一元一次方程的系数和常数项（格式为 ax + b = 0）：" << std::endl;\n std::cout << "a = " ;\n std::cin >> a;\n std::cout << "b = " ;\n std::cin >> b;\n \n if (a == 0) {\n if (b == 0) {\n std::cout << "方程有无穷多解。" << std::endl;\n } else {\n std::cout << "方程无解。" << std::endl;\n } \n } else {\n double x = -b / a;\n std::cout << "方程的解为 x = " << x << std::endl;\n }\n \n return 0;\n}