如何使用C中的复数？

Question

如何使用C中的复数？

如何使用C中的复数？我看到有一个complex.h头文件，但它没有给我很多关于如何使用它的信息。如何以有效的方式访问实部和虚部？是否有本机功能来获取模块和阶段？

Answer 1

这段代码对你有帮助，而且相当不言自明：#include <stdio.h>&nbsp; &nbsp; &nbsp; /* Standard Library of Input and Output */#include <complex.h>&nbsp; &nbsp; /* Standard Library of Complex Numbers */int main() {&nbsp; &nbsp; double complex z1 = 1.0 + 3.0 * I;&nbsp; &nbsp; double complex z2 = 1.0 - 4.0 * I;&nbsp; &nbsp; printf("Working with complex numbers:\n\v");&nbsp; &nbsp; printf("Starting values: Z1 = %.2f + %.2fi\tZ2 = %.2f %+.2fi\n", creal(z1), cimag(z1), creal(z2), cimag(z2));&nbsp; &nbsp; double complex sum = z1 + z2;&nbsp; &nbsp; printf("The sum: Z1 + Z2 = %.2f %+.2fi\n", creal(sum), cimag(sum));&nbsp; &nbsp; double complex difference = z1 - z2;&nbsp; &nbsp; printf("The difference: Z1 - Z2 = %.2f %+.2fi\n", creal(difference), cimag(difference));&nbsp; &nbsp; double complex product = z1 * z2;&nbsp; &nbsp; printf("The product: Z1 x Z2 = %.2f %+.2fi\n", creal(product), cimag(product));&nbsp; &nbsp; double complex quotient = z1 / z2;&nbsp; &nbsp; printf("The quotient: Z1 / Z2 = %.2f %+.2fi\n", creal(quotient), cimag(quotient));&nbsp; &nbsp; double complex conjugate = conj(z1);&nbsp; &nbsp; printf("The conjugate of Z1 = %.2f %+.2fi\n", creal(conjugate), cimag(conjugate));&nbsp; &nbsp; return 0;}&nbsp; 有：creal(z1)：得到真正的部分（浮动crealf(z1)，长双creall(z1)）cimag(z1)：得到虚部（浮动cimagf(z1)，长双cimagl(z1)）另外要记住很重要的一点，当使用复数的工作是一样的功能cos()，exp()并且sqrt()必须与他们复杂的形式，例如更换ccos()，cexp()，csqrt()。

Answer 2

Complex.h#include <stdio.h>&nbsp; &nbsp; &nbsp; /* Standard Library of Input and Output */#include <complex.h>&nbsp; &nbsp; /* Standart Library of Complex Numbers */int main()&nbsp;{&nbsp; &nbsp; double complex z1 = 1.0 + 3.0 * I;&nbsp; &nbsp; double complex z2 = 1.0 - 4.0 * I;&nbsp; &nbsp; printf("Working with complex numbers:\n\v");&nbsp; &nbsp; printf("Starting values: Z1 = %.2f + %.2fi\tZ2 = %.2f %+.2fi\n",&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;creal(z1),&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;cimag(z1),&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;creal(z2),&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;cimag(z2));&nbsp; &nbsp; double complex sum = z1 + z2;&nbsp; &nbsp; printf("The sum: Z1 + Z2 = %.2f %+.2fi\n", creal(sum), cimag(sum));}