课程设计__复数的计算

1、操作符重载

2、这里的复数并没有用class，下一篇会有。

#include <stdio.h>
#include <algorithm>
#include <iostream>

using namespace std;

struct Complex
{
    float real;
    float imag;
};

Complex operator +(Complex &a,Complex &b)
{
    Complex c;
    c.real=a.real+b.real;
    c.imag=a.imag+b.imag;
    return c;
}

Complex operator -(Complex &a,Complex &b)
{
    Complex c;
    c.real=a.real-b.real;
    c.imag=a.imag-b.imag;
    return c;
}

Complex operator *(Complex &a,Complex &b)
{
    Complex c;
    c.real=a.real*b.real-a.imag*b.imag;
    c.imag=a.real*b.imag+a.imag*b.real;
    return c;
}

Complex operator /(Complex &a,Complex &b)
{
    float fm;
    fm=a.real*b.real-a.imag*b.imag;///分母
    Complex c;
    c.real=(a.real*b.real-a.imag*b.imag)/fm;
    c.imag=(a.real*b.imag+a.imag*b.real)/fm;
    return c;
}

void printFormerAdd(Complex &a,Complex &b)///打印加法的原式
{
    printf("(%.1f ,%.1f i)+(%.1f ,%.1f i)=",a.real,a.imag,b.real,b.imag);
}

void printFormerSub(Complex &a,Complex &b)///打印减法的原式
{
    printf("(%.1f ,%.1f i)-(%.1f ,%.1f i)=",a.real,a.imag,b.real,b.imag);
}

void printFormerMul(Complex &a,Complex &b)///打印乘法的原式
{
    printf("(%.1f ,%.1f i)*(%.1f ,%.1f i)=",a.real,a.imag,b.real,b.imag);
}

void printFormerDiv(Complex &a,Complex &b)///打印除法的原式
{
    printf("(%.1f ,%.1f i)/(%.1f ,%.1f i)=",a.real,a.imag,b.real,b.imag);
}

void print(Complex c)///打印结果
{
    printf("(%.1f ,%.1f i)\n",c.real,c.imag);
}

int main()
{
        Complex a,b,c;
        printf("This is complex's operation\n");
        printf("Please input your wants complex's operation\n");
        char o;
        scanf("%c",&o);
        system("cls");
        switch (o)
        {
        case '+':
            printf("Please input two complex's real and imag\n");
            scanf("%f%f",&a.real,&a.imag);
            scanf("%f%f",&b.real,&b.imag);
            c=a+b;
            printFormerAdd(a,b);
            print(c);
            break;
        case '-':
            printf("Please input two complex's real and imag\n");
            scanf("%f%f",&a.real,&a.imag);
            scanf("%f%f",&b.real,&b.imag);
            c=a-b;
            printFormerSub(a,b);
            print(c);
            break;
        case '*':
            printf("Please input two complex's real and imag\n");
            scanf("%f%f",&a.real,&a.imag);
            scanf("%f%f",&b.real,&b.imag);
            c=a*b;
            printFormerMul(a,b);
            print(c);
            break;
        case '/':
            printf("Please input two complex's real and imag\n");
            scanf("%f%f",&a.real,&a.imag);
            scanf("%f%f",&b.real,&b.imag);
            c=a/b;
            printFormerDiv(a,b);
            print(c);
            break;
        }
        system("pause");
    return 0;
}