蓝桥杯 算法训练 P1103

 算法训练 P1103  

时间限制：1.0s   内存限制：256.0MB

    

　　
　　编程实现两个复数的运算。设有两个复数 和 ，则他们的运算公式为：

　　要求：（1）定义一个结构体类型来描述复数。
　　（2）复数之间的加法、减法、乘法和除法分别用不用的函数来实现。
　　（3）必须使用结构体指针的方法把函数的计算结果返回。
　　说明：用户输入：运算符号(+,-,*,/) a b c d.
　　输出：a+bi，输出时不管a,b是小于0或等于0都按该格式输出，输出时a,b都保留两位。

输入：
　　- 2.5 3.6 1.5 4.9
输出：
　　1.00+-1.30i

主要考察结构体的应用和复数的运算

代码：

#include<iostream>
#include<iomanip>
using namespace std;
struct Fushu{
double ss;
double xs;
};
struct Fushu add(struct Fushu a,struct Fushu b)
{
   struct Fushu  c;
   c.ss=a.ss+b.ss;
   c.xs=a.xs+b.xs;
   return c;
}
struct Fushu sub(struct Fushu a,struct Fushu b)
{
   struct Fushu  c;
   c.ss=a.ss-b.ss;
   c.xs=a.xs-b.xs;
   return c;
}
struct Fushu mul(struct Fushu a,struct Fushu b)
{ 
   struct Fushu  c;
   c.ss=a.ss*b.ss-a.xs*b.xs;
   c.xs=a.xs*b.ss+a.ss*b.xs;
   return c;
}
struct Fushu div(struct Fushu a,struct Fushu b)
{
   struct Fushu  c;
   c.ss=(a.ss*b.ss+a.xs*b.xs)/(b.ss*b.ss+b.xs*b.xs);
   c.xs=(a.xs*b.ss-a.ss*b.xs)/(b.ss*b.ss+b.xs*b.xs);
   return c;
}
int main()
{
struct Fushu f1,f2,mid;
struct Fushu *p;
char   operator1;
cin>>operator1;
cin>>f1.ss>>f1.xs>>f2.ss>>f2.xs;
if(operator1=='+') {
mid=add(f1,f2);
  p=&mid;
  cout<<fixed<<setprecision(2)<<p->ss<<"+"<<p->xs<<"i";//用于控制输出的小数点的位数
}
if(operator1=='-') {
mid=sub(f1,f2);
  p=&mid;
  cout<<fixed<<setprecision(2)<<p->ss<<"+"<<p->xs<<"i";
}
if(operator1=='*') {
 mid=mul(f1,f2);
  p=&mid;
  cout<<fixed<<setprecision(2)<<p->ss<<"+"<<p->xs<<"i";
}
if(operator1=='/') {
 mid=div(f1,f2);
  p=&mid;
  cout<<fixed<<setprecision(2)<<p->ss<<"+"<<p->xs<<"i";
}
return 0;
} 

关于输出setprecision、fixed、showpoint的用法总结 可参考点击打开链接

c语言版

#include<stdio.h>
struct Fushu{
double ss;
double xs;
};
struct Fushu add(struct Fushu a,struct Fushu b)
{
   struct Fushu  c;
   c.ss=a.ss+b.ss;
   c.xs=a.xs+b.xs;
   return c;
}
struct Fushu sub(struct Fushu a,struct Fushu b)
{
   struct Fushu  c;
   c.ss=a.ss-b.ss;
   c.xs=a.xs-b.xs;
   return c;
}
struct Fushu mul(struct Fushu a,struct Fushu b)
{
   struct Fushu  c;
   c.ss=a.ss*b.ss-a.xs*b.xs;
   c.xs=a.xs*b.ss+a.ss*b.xs;
   return c;
}
struct Fushu div(struct Fushu a,struct Fushu b)
{
   struct Fushu  c;
   c.ss=(a.ss*b.ss+a.xs*b.xs)/(b.ss*b.ss+b.xs*b.xs);
   c.xs=(a.xs*b.ss-a.ss*b.xs)/(b.ss*b.ss+b.xs*b.xs);
   return c;
}
int main()
{
struct Fushu f1,f2,mid;
struct Fushu *p;
char   operator1;
scanf("%c %lf %lf %lf %lf",&operator1,&f1.ss,&f1.xs,&f2.ss,&f2.xs);
if(operator1=='+') {
mid=add(f1,f2);
  p=&mid;
  printf("%.2lf+%.2lfi",p->ss,p->xs);
}
if(operator1=='-') {
mid=sub(f1,f2);
  p=&mid;
  printf("%.2lf+%.2lfi",p->ss,p->xs);
}
if(operator1=='*') {
  mid=mul(f1,f2);
  p=&mid;
  printf("%.2lf+%.2lfi",p->ss,p->xs);
}
if(operator1=='/') {
  mid=div(f1,f2);
  p=&mid;
  printf("%.2lf+%.2lfi",p->ss,p->xs);
}
return 0;
}