Question

试用C语言的结构类型定义表示复数的抽象数据类型

（1）在复数内部用浮点数定义其实部与虚部； （2）设计实现复数的＋、－、×、÷等运算的函数。 要求运行界面如下： please input first complex number : a + bi the other one : c+ di please choice operation: +, -, * or /:+ (a + bi)+ (c+ di)=……

Answer 1

#include <stdio.h>

//结构体
typedef struct
{
double a;
double b;
} COMPLEX;
//加
COMPLEX add (COMPLEX a, COMPLEX b)
{
a.a += b.a;
a.b += b.b;
return a;
}

//减
COMPLEX subtract (COMPLEX a, COMPLEX b)
{
a.a -= b.a;
a.b -= b.b;
return a;
}
//乘
COMPLEX multiply (COMPLEX a, COMPLEX b)
{
COMPLEX c;
c.a = a.a*b.a - a.b*b.b;
c.b = a.a*b.b + a.b*b.a;
return c;
}
//除
COMPLEX divide (COMPLEX a, COMPLEX b) {
COMPLEX c;
double divisor = b.a*b.a + b.b*b.b;
if (divisor - 0 == 0)
exit (0);
c.a = (a.a*b.a + a.b*b.b) / divisor;
c.b = (a.b*b.a - a.a*b.b) / divisor;
return c;
}
然后读入数据，判断运算符号就行了。