抽象数据类型（复数四则运算实现）

void multiply(Complex *C, Complex A,Complex B)//A*B
{
    C -> realpart = A.realpart * B.realpart - A.imagpart*B.imagpart;C -> imagpart = A.imagpart*B.realpart + A.realpart*B.imagpart;
}

void divide(Complex *C, Complex A,Complex B)//A/B
{
    C -> realpart = (A.realpart * B.realpart + A.imagpart*B.imagpart)/(B.realpart*B.realpart  + B.imagpart*B.imagpart);C -> imagpart = (A.imagpart*B.realpart - A.realpart*B.imagpart)/(B.realpart*B.realpart  + B.imagpart*B.imagpart);
}

【完整实现代码】

// By yangbocsu 2021.07.08 民主楼
#include <stdio.h>
typedef struct
{
    float realpart;float imagpart;
} Complex;void assign(Complex *A, float real,float imag);//赋值
void add(Complex *C, Complex A,Complex B);//A+B
void minu(Complex *C, Complex A,Complex B);//A-B
void multiply(Complex *C, Complex A,Complex B);//A*B
void divide(Complex *C, Complex A,Complex B);//A/Bint main(int argc, char const *argv[])
{
    Complex z1,z2,z3,z4,z5,z6;assign(&z1,8.0,6.0);assign(&z2,4.0,3.0);// assign(&z1,1.0,2.0);// assign(&z2,2.0,-3.0);add(&z3,z1,z2);minu(&z4,z1,z2);multiply(&z5,z1,z2);divide(&z6,z1,z2);printf("z1 = %f+%fi\n",z1.realpart,z1.imagpart);printf("z2 = %f+%fi\n",z2.realpart,z2.imagpart);printf("z1 + z2 = %f+%fi\n",z3.realpart,z3.imagpart);printf("z1 - z2 = %f+%fi\n",z4.realpart,z4.imagpart);printf("z1 * z2 = %f+%fi\n",z5.realpart,z5.imagpart);printf("z1 / z2 = %f+%fi\n",z6.realpart,z6.imagpart);return 0;
}void assign(Complex *A, float real,float imag)//赋值
{
    A -> realpart = real;A -> imagpart = imag;
}
void add(Complex *C, Complex A,Complex B)//A+B
{
    C -> realpart = A.realpart + B.realpart;C -> imagpart = A.imagpart + B.imagpart;
}
void minu(Complex *C, Complex A,Complex B)//A+B
{
    C -> realpart = A.realpart - B.realpart;C -> imagpart = A.imagpart - B.imagpart;
}
void multiply(Complex *C, Complex A,Complex B)//A*B
{
    C -> realpart = A.realpart * B.realpart - A.imagpart*B.imagpart;C -> imagpart = A.imagpart*B.realpart + A.realpart*B.imagpart;
}
void divide(Complex *C, Complex A,Complex B)//A/B
{
    C -> realpart = (A.realpart * B.realpart + A.imagpart*B.imagpart)/(B.realpart*B.realpart  + B.imagpart*B.imagpart);C -> imagpart = (A.imagpart*B.realpart - A.realpart*B.imagpart)/(B.realpart*B.realpart  + B.imagpart*B.imagpart);
}