用C++编写一个小型复数计算器

需要自己仔细看看哦。

#include<iostream>
#include<cmath>
#include<cstdlib>
#include<cstring>
#include<fstream>
#include<ctime>

#define EPS 1e-5 //定义精度常数
using namespace std; //使用标准空间命名std
namespace NameCComplex //定义命名空间NameCComplex
{
class CComplex ////定义一个CComplex类
{
private:
double Real,Image;
public:
CComplex(double real=0,double image=0) //构造函数
{
Real=real;
Image=image;
}
friend istream & operator>>(istream &is,CComplex &com); //重载输入
friend ostream & operator<<(ostream &os,CComplex &com); //重载输出
CComplex operator+(CComplex &com); //加法重载
CComplex operator-(CComplex &com); //减法重载
CComplex operator*(CComplex &com); //乘法重载
CComplex operator+=(CComplex &com); //加法赋值重载
CComplex operator-=(CComplex &com); //减法赋值重载
CComplex operator*=(CComplex &com); //乘法赋值重载
CComplex operator++(); //自加
CComplex operator--(); //自减
double mod(void); //求复数的模
int operator>(CComplex &com);
int operator<(CComplex &com);
int operator!=(CComplex &com);
int operator==(CComplex &com);
};
struct User //用户结构体类型定义
{
char szName[20]; //用户名
int nTime; //使用次数
int nTest; //测试次数
double alAve; //平均成绩
int nAdd; //加法次数
int nSub; //减法次数
int nMul; //乘法次数
double dlScore[3]; //3次测试得分
}user; //定义全局变量

CComplex CComplex::operator++() //重载运算符"++"，实部与虚部均加1
{
Real++;
Image++;
return *this;
}
CComplex CComplex::operator--() //重载运算符"--"，实部与虚部均减1
{
Real--;
Image--;
return *this;
}
double CComplex::mod() //求复数的模的平方，返回实部^2+虚部^2
{
return Real*Real+Image*Image;
}
int CComplex::operator>(CComplex &com) //重载运算符">"，比较模的大小
{
if(mod()>com.mod())
return 1;
else
return 0;
}
int CComplex::operator<(CComplex &com)
{
if(mod()<com.mod())
return 1; //若大，则返回1
else
return 0;
}
int CComplex::operator!=(CComplex &com)
//重载运算符"！="，分别判断复数的实部和虚部
{
if(*this==com)
return 0;
else
return 1;
}
istream & operator>>(istream &is,CComplex &com) //重载输入，可以输入a+bi的形式
{
cout<<"请输入复数:";
char s[80];
is>>s; //用字符串的形式接受复数
int len=strlen(s); //求出字符串的长度
int n=0,sign=1;
//n为当前从字符串中提取出来的数字，初始化为0；sign是难道符号，初始化为正
com.Image=com.Real=0;
for(int k=0;k<len;k++) //判断接受的字符串是否合法
{
if((s[k]<'0' || s[k]> '9') && (s[k]!='+' && s[k]!='-' && s[k]!='i'))
{
cout<<"error"<<endl;
return is; //错误，输出出错信息并返回
}
}
for(k=0;k<len;) //顺序识别字符串中各字符
{
if(n!=0 &&(s[k]=='-'||s[k]=='+')) //当前字符是否是符号位
{
com.Real=sign*n;
//是符号位，且n!=0，即n已被赋值，表明当前读取的是虚部的符号
n=0; //将原n*sign值赋给实部，将n清零，准备接受虚部的值
}
if(s[k]=='-') //当前字符为负号
{
sign=-1;k++; //给符号标志赋值
}
if(s[k]=='+') //当前字符为正号
{
sign=1;k++; //给符号标志赋值
}
if(s[k]=='i') //当前字符为'I'
{
if(k!=len-1) //判断字符'I'是否为字符串中作后一个字符
cout<<"error\n"; //如果不是，说明复数数据格式错误
else
com.Image=sign*n;
//是最后一个字符，复数对象已接受完，用sign*n为虚部赋值
break;
}
while(s[k]>='0' && s[k]<='9')
//当前字符在0～9之间，将数字字符转换成数字数值
{
n=n*10+s[k]-'0';
k++;
}
}
if(s[len-1]!='i' && n!=0)
//如果最后一个字符不是'I'，表示复数对象内只有实部，没有虚部
{
com.Real=n*sign;
}
return is;
}
ostream & operator<<(ostream &os,CComplex &com) //重载输入
{
if(fabs(com.Image)<EPS) // 如果虚部为0
os<<com.Real; //只输出实部
else if((fabs(com.Real)<EPS)) //如果实部为0
os<<com.Image<<"i"; //只输出虚部
else if(com.Image>0)
os<<com.Real<<"+"<<com.Image<<"i";
else
os<<com.Real<<com.Image<<"i"; //虚部为正
return os;
}
CComplex CComplex::operator+(CComplex &com) //加法重载
{
CComplex sum;
sum.Real=Real+com.Real; //实部相加
sum.Image=Image+com.Image; //虚部相加
return sum;
}
CComplex CComplex::operator*(CComplex &com) //乘法重载
{
CComplex multi;
multi.Real=Real*com.Real-Image*com.Image; //乘积实部
multi.Image=Real*com.Image+Image*com.Real; //乘积虚部
return multi;
}
CComplex CComplex::operator-(CComplex &com) //减法重载
{
CComplex sub;

sub.Real=Real-com.Real;
sub.Image=Image-com.Image;
return sub;
}
CComplex CComplex::operator+=(CComplex &com) //重载加法赋值
{
Real=Real+com.Real;
Image=Image+com.Image;
return *this;
}
CComplex CComplex::operator-=(CComplex &com) //重载减法赋值
{
Real=Real-com.Real;
Image=Image-com.Image;
return *this;
}
CComplex CComplex::operator*=(CComplex &com) //重载乘法赋值
{
double nReal=Real*com.Real-Image*com.Image;
double nImage=Real*com.Image+Image*com.Real;
Real=nReal;
Image=nImage;
return *this;
}
int CComplex::operator==(CComplex &com) //重载等于
{
if(Real==com.Real && Image==com.Image)
return 1;
else
return 0;
}
void Test(void) //测试函数
{
user.nTest++;
cout<<"共10道题，做100以内的加减运算，满分100分:\n";
double real1,real2,image1,image2,real3,real4,image3,image4;
CComplex answer,temp;
int score=0;
char op;
for(int i=0;i<=9;i++)
{
/////为复数产生随机值
real1=rand()%200-100;
image1=rand()%200-100;
real2=rand()%200-100;
image2=rand()%200-100;
CComplex a(real1,image1),b(real2,image2);
real3=rand()%20-10;
image3=rand()%20-10;
real4=rand()%20-10;
image4=rand()%20-10;
CComplex c(real3,image3),d(real4,image4);
op=rand()%3; //产生随机加减乘法运算的三个值
switch(op)
{
case 0:
answer=a+b;
cout<<a<<"加上"<<b<<"等于";
break;
case 1:
answer=a-b;
cout<<a<<"减去"<<b<<"等于";
break;
case 2:
answer=c*d;
cout<<c<<"乘以"<<d<<"等于";
break;
}
cin>>temp; //输入用户计算值
if(answer==temp) //比较用户计算值
{
score+=10;
}
else
{
cout<<"此题做错了\n";
cout<<"正确答案为:"<<answer<<endl;
}
}
cout<<"你的最后得分是:"<<score<<endl;
if(user.nTest<=3)
{
user.alAve=0;
user.dlScore[user.nTest-1]=score;
for(int i=0;i<user.nTest;i++)
user.alAve+=user.dlScore[i];
user.alAve=user.alAve/user.nTest;
}
else
{
user.dlScore[0]=user.dlScore[1];
user.dlScore[1]=user.dlScore[2];
user.dlScore[2]=score;
for(i=0,user.alAve=0;i<3;i++)
user.alAve+=user.dlScore[i];
user.alAve=user.alAve/3;
}
cout<<"请按任意键继续\n";
cout.flush();
cin.get();
cin.get();
}
void Add() //复数加法运算函数
{
user.nAdd++;
CComplex num1,num2,sum,Zero(0,0);
cout<<"加法计算\n"<<"最少输入两个复数,并且以0结束\n";
cout<<"第一个复数:";
cin>>num1;
cout<<"第二个复数:";
cin>>num2;
sum=num1+num2;
cout<<"第三个复数:";
cin>>num1;
int i=4;
while(!(num1==Zero))
{
sum=sum+num1;
cout<<"第"<<i<<"个复数:";
cin>>num1;
i++;
}
cout<<"加法结果是:"<<sum<<endl;
cout<<"请按任意键继续\n";
cout.flush();
cin.get();
cin.get();
}
void Sub() //复数减法预算函数
{
user.nSub++;
CComplex num1,num2,sub,Zero(0,0);
cout<<"最少输入两个复数，并且以0结束\n";
cout<<"第1个复数:";
cin>>num1;
cout<<"第2个复数:";
cin>>num2;
sub=num1-num2;
cout<<"第3个复数:";
cin>>num1;
int i=4;
while(!(num1==Zero))
{
sub=sub-num1;
cout<<"第"<<i<<"个复数:";
cin>>num1;
i++;
}
cout<<"减法结果是:"<<sub<<endl;
cout<<"请按任意键继续\n";
cout.flush();
cin.get();
cin.get();
}
void Mul() //复数乘积函数
{
user.nMul++;
CComplex num1,num2,mul,Zero(0,0);
cout<<"乘法计算\n"<<"最少输入两个复数,并且以零结束\n";
cout<<"第一个复数:";
cin>>num1;
cout<<"第二个复数:";
cin>>num2;
mul=num1*num2;
cout<<"第三个复数:";
cin>>num1;
int i=4;
while(!(num1==Zero))
{
mul*=num1;
cout<<"第"<<i<<"个复数:";
cin>>num1;
i++;
}
cout<<"乘法结果是:"<<mul<<endl;
cout<<"请按任意键继续\n";
cout.flush();
cin.get();
cin.get();
}
void Add1()
{
user.nAdd ++;
CComplex num1;
cin>>num1;
++num1;
cout<<"自加的结果为"<<num1<<endl;
cout<<"按任意键结束\n";
cout.flush();
cin.get();
cin.get();
}
void Sub1() //复数自加运算函数
{
user.nSub++;
CComplex num1;
cin>>num1;
--num1;
cout<<"自减的结果为"<<num1<<endl;
cout<<"按任意键结束\n";
cout.flush();
cin.get();
cin.get();
}
void compare() //两复数比较函数
{
CComplex num1,num2;
cout<<"输入两个复数\n";
cout<<"第一个复数:";
cin>>num1;
cout<<"输入第二个复数\n";
cin>>num2;
if(num1==num2)
cout<<"这两个复数相等\n";
else if(num1>num2)
cout<<num1<<"的模大于"<<num2<<"的模\n";
else if(num1<num2)
cout<<num2<<"的模大于"<<num1<<"的模\n";
else
cout<<"这两个复数的模相等\n";
cout<<"按任意键继续\n";
cin.get();
cin.get();
}
void userprint() //输出用户信息函数
{
cout<<user.szName<<"使用的次数为:"<<user.nTime<<endl;
cout<<"其中:\t加法的次数:"<<user.nAdd<<"\t减法的次数:"<<user.nSub<<"\t乘法的次数:"<<user.nMul<<endl;
cout<<"\t测试次数:"<<user.nTest<<"\t平均成绩:"<<user.alAve<<endl;
}
void Login() //当前用户信息函数
{
char szName[20];
cout<<"请输入您的姓名:";
cin.getline(szName,20);
ifstream infile;
User user1;
infile.open("user.dat",ios::binary|ios::in);
if(!infile)
{
cout<<"没有原始记录文件，您是第一个用户!\n";
strcpy(user.szName,szName);
user.nTest++;
return;
}
infile.read((char *)&user1,sizeof(User));
while(!infile.eof())
{
if(strcmp(user1.szName,szName)==0)
{
user=user1;
user.nTime++;
cout<<"欢迎您再次使用复数计算器!";
userprint();
cin.get();
infile.close();
return;
}
infile.read((char *) &user1,sizeof(User));
}
cout<<"欢迎您再次使用复数计算器!";
strcpy(user.szName,szName);
user.nTime++;
infile.close();
return;
}
void SaveFile() //用户资料保存函数
{
userprint();
fstream file;
User user1;
file.open("user.dat",ios::binary|ios::in|ios::out);
if(!file)
{
cout<<"文件打开错误，不能进行更新!\n";
return;
}
file.seekp(0,ios::beg);
while(!file.eof())
{
file.read((char *)&user1,sizeof(User));
if(strcmp(user1.szName,user.szName)==0)
{
file.seekp(-(sizeof(User)),ios::cur);
file.write((char *)&user,sizeof(User));
file.close();
return;
}
}
file.close();
fstream outfile;
outfile.open("user.dat",ios::binary|ios::app);
outfile.write((char *)&user,sizeof(User));
outfile.close();
return;
}
}
using namespace NameCComplex;
int main(void) //主函数开始
{
srand(time(NULL)); //初始化随机数“种子”语句
Login(); //当前用户信息函数
char strChoise[20]; //定义字符串名
do
{
system("cls");
cout<<"\t这是一个简单的复数计算器程序，可以实现以下功能，请按对应的按键(1-7)\n\n\n";
cout<<"\t=========================MENU===========================\n";
cout<<"\t1:多复数加法，以0结束\n";
cout<<"\t2:多复数减法，以0结束\n";
cout<<"\t3:测试100以内的复数加减乘法运算，1次测试10道题\n";
cout<<"\t4:多复数乘法，以0结束\n";
cout<<"\t5:复数自加\n:";
cout<<"\t6:复数自减\n:";
cout<<"\t7:复数比较\n:";
cout<<"\t0:退出程序\n\n:";
cout<<"\t请您选择:";
cin>>strChoise;
if(strcmp(strChoise,"1")==0) //用户选1则调用Add()函数
Add();
else if(strcmp(strChoise,"2")==0) //用户选2则调用Sub()函数
Sub();
else if(strcmp(strChoise,"3")==0) //用户选3则调用Test()函数
Test();
else if(strcmp(strChoise,"4")==0) //用户选4则调用Add()函数
Mul();
else if(strcmp(strChoise,"5")==0) //用户选5调用Add1()函数
Add1();
else if(strcmp(strChoise,"6")==0) //用户选6则调用Sub1()函数
Sub1();
else if(strcmp(strChoise,"7")==0) //用户选7则调用Compare()函数
compare();
else if(strcmp(strChoise,"0")==0) //用户选0则结束调用函数
{
cout<<"\n\n\t欢迎下次继续使用复数计算器!\n\n";
break;
}
else
{
cout<<"\n\t输入错误，请按任意键继续!\n";
cin.get();
cin.get();
}
}
while((strcmp(strChoise,"0")));
SaveFile(); //调用用户资料保存函数
return 0;
}

参考资料：http://hi.baidu.com/raoguojun/blog/item/257edc11e81bc110b8127b14.html

本回答被提问者采纳

#include <stdlib.h>
#include <math.h>
#include <graphics.h>
#include <stdio.h>
#include <process.h>
#define EXCAPE 27
#define ENTER 13
main(){
int press,i,x,y,x1,y1,ch_z=0;
int dian=0;
char ch='0'; /*input + - * / */
char emp[80],sum[80],*e,*s;
double yuan=0.000000000000;
void init(void);
void clear_z(char *u);
double strtoflt(char *p);
int getkey();
int gd=DETECT, gm;
initgraph(&gd, &gm, "");
e=emp;
s=sum;
init();
x = (getmaxx() / 2) - 120;
y = (getmaxy() / 2) - 150;
x1 = (getmaxx() / 2) + 120;
y1 = (getmaxy() / 2) + 150;
while(1){
press = getkey();
switch(press){
case EXCAPE:
exit(0);
case 47:
bar (x + 10, y + 80 + 10, x + 60 - 10, y + 80 + 60 - 10);
delay(8000);
init();
if (ch!='0'){
switch(ch){
case '/':
if (strtoflt(emp)==0.0){
ch='0';
ch_z=0;
dian=0;
emp[0]='\0';
sum[0]='\0';
e=emp;
s=sum;
outtextxy(x+30,y+40,"error!!!!!");
break;
}
yuan = strtoflt(sum) / strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
clear_z(sum);
outtextxy(x+30,y+40,sum);
break;
case '*':
yuan = strtoflt(sum) * strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
clear_z(sum);
outtextxy(x+30,y+40,sum);
break;
case '+':
yuan = strtoflt(sum) + strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
clear_z(sum);
outtextxy(x+30,y+40,sum);
break;
case '-':
if (strtoflt(sum)>=strtoflt(emp)){
yuan = strtoflt(sum) - strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
}
else{
yuan=strtoflt(emp)-strtoflt(sum);
sprintf(sum,"-%0.10f",yuan);
}
clear_z(sum);
outtextxy(x+30,y+40,sum);
emp[0]='\0';
}
}
else{
if (ch_z==0){
outtextxy(x+30,y+40,emp);
stpcpy(sum,emp);

}
else{
outtextxy(x+30,y+40,sum);

}
}
ch='/';
ch_z=0;
emp[0]='\0';
e=emp;
dian=0;
break;
case 42:
bar (x + 60 + 10, y + 80 + 10, x + 60 * 2 - 10, y + 80 + 60 - 10);
delay(8000);
init();
if (ch!='0'){
switch(ch){
case '/':
yuan = strtoflt(sum) / strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
clear_z(sum);
outtextxy(x+30,y+40,sum);
emp[0]='\0';
e=emp;
break;
case '*':
yuan = strtoflt(sum) * strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
clear_z(sum);
outtextxy(x+30,y+40,sum);
emp[0]='\0';
e=emp;
break;
case '+':
yuan = strtoflt(sum) + strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
clear_z(sum);
outtextxy(x+30,y+40,sum);
emp[0]='\0';
e=emp;
break;
case '-':
if (strtoflt(sum)>=strtoflt(emp)){
yuan = strtoflt(sum) - strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
}
else{
yuan=strtoflt(emp)-strtoflt(sum);
sprintf(sum,"-%0.10f",yuan);
}
clear_z(sum);
outtextxy(x+30,y+40,sum);
emp[0]='\0';
e=emp;
break;
}
}
else{
if (ch_z==0){
outtextxy(x+30,y+40,emp);
stpcpy(sum,emp);
e=emp;
}
else
outtextxy(x+30,y+40,sum);
}
ch='*';
ch_z=0;
dian=0;
break;
case 45:
bar (x + 60 * 2 + 10, y + 80 + 10, x + 60 * 3 - 10, y + 80 + 60 - 10);
delay(8000);
init();
if (ch!='0'){
switch(ch){
case '/':
yuan = strtoflt(sum) / strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
clear_z(sum);
outtextxy(x+30,y+40,sum);
emp[0]='\0';
e=emp;
break;
case '*':
yuan = strtoflt(sum) * strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
clear_z(sum);
outtextxy(x+30,y+40,sum);
emp[0]='\0';
e=emp;
break;
case '+':
yuan = strtoflt(sum) + strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
clear_z(sum);
outtextxy(x+30,y+40,sum);
emp[0]='\0';
e=emp;
break;
case '-':
if (strtoflt(sum)>=strtoflt(emp)){
yuan = strtoflt(sum) - strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
}
else{
yuan=strtoflt(emp)-strtoflt(sum);
sprintf(sum,"-%0.10f",yuan);
}
clear_z(sum);
outtextxy(x+30,y+40,sum);
emp[0]='\0';
e=emp;
break;
}
}
else{
if (ch_z==0){
outtextxy(x+30,y+40,emp);
stpcpy(sum,emp);
e=emp;
}
else
outtextxy(x+30,y+40,sum);
}
ch='-';
ch_z=0;
dian=0;
break;
case 43:
bar (x + 60 * 3 + 10, y + 80 + 10, x + 60 * 4 - 10, y + 80 + 60 - 10);
delay(8000);
init();
if (ch!='0'){
switch(ch){
case '/':
yuan = strtoflt(sum) / strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
clear_z(sum);
outtextxy(x+30,y+40,sum);
emp[0]='\0';
e=emp;
break;
case '*':
yuan = strtoflt(sum) * strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
clear_z(sum);
outtextxy(x+30,y+40,sum);
emp[0]='\0';
e=emp;
break;
case '+':
yuan = strtoflt(sum) + strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
clear_z(sum);
outtextxy(x+30,y+40,sum);
emp[0]='\0';
e=emp;
break;
case '-':
if (strtoflt(sum)>=strtoflt(emp)){
yuan = strtoflt(sum) - strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
}
else{
yuan=strtoflt(emp)-strtoflt(sum);
sprintf(sum,"-%0.10f",yuan);
}
clear_z(sum);
outtextxy(x+30,y+40,sum);
emp[0]='\0';
e=emp;
break;
}
}
else{
if (ch_z==0){
outtextxy(x+30,y+40,emp);
stpcpy(sum,emp);
e=emp;
}
else
outtextxy(x+30,y+40,sum);
}
ch='+';
ch_z=0;
dian=0;
break;
case 49:
bar (x + 10, y + 80 + 53 + 10, x + 60 - 10, y + 80 + 53 * 2 - 4);
delay(8000);
init();
for (i=0;i<=79;i++){
if (emp[i]=='\0')
break;
}
if (ch_z==0){
*e='1';e++;*e='\0';
outtextxy(x+30,y+40,emp);
}
else{
outtextxy(x+30,y+40,sum);
}
break;
case 50:
bar (x + 60 + 10, y + 80 + 53 + 10, x + 60 * 2 - 10, y + 80 + 53 * 2 - 4);
delay(8000);
init();
for (i=0;i<=79;i++){
if (emp[i]=='\0')
break;
}
if (ch_z==0){
*e='2';e++;*e='\0';
outtextxy(x+30,y+40,emp);
}
else{
outtextxy(x+30,y+40,sum);
}
break;
case 51:
bar (x + 60 * 2 + 10, y + 80 + 53 + 10, x + 60 * 3 - 10, y + 80 + 53 * 2 - 4);
delay(8000);
init();
for (i=0;i<=79;i++){
if (emp[i]=='\0')
break;
}
if (ch_z==0){
*e='3';e++;*e='\0';
outtextxy(x+30,y+40,emp);
}
else{
outtextxy(x+30,y+40,sum);
}
break;
case ENTER:
bar (x + 60 * 3 + 10, y + 80 + 53 + 10, x + 60 * 4 - 10, y + 80 + 53 * 2 - 4);
delay(8000);
init();
if (ch!='0'){
switch(ch){
case '/':
yuan = strtoflt(sum) / strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
clear_z(sum);
outtextxy(x+30,y+40,sum);
emp[0]='\0';
e=emp;
break;
case '*':
yuan = strtoflt(sum) * strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
clear_z(sum);
outtextxy(x+30,y+40,sum);
emp[0]='\0';
e=emp;
break;
case '+':
yuan = strtoflt(sum) + strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
clear_z(sum);
outtextxy(x+30,y+40,sum);
emp[0]='\0';
e=emp;
break;
case '-':
if (strtoflt(sum)>=strtoflt(emp)){
yuan = strtoflt(sum) - strtoflt(emp);
sprintf(sum,"%0.10f",yuan);
}
else{
yuan=strtoflt(emp)-strtoflt(sum);
sprintf(sum,"-%0.10f",yuan);
}
clear_z(sum);
outtextxy(x+30,y+40,sum);
emp[0]='\0';
e=emp;
break;
}
}
else{
if (ch_z==0){
outtextxy(x+30,y+40,emp);
stpcpy(sum,emp);
e=emp;
}
else{
outtextxy(x+30,y+40,sum);
}
}
ch='0';
ch_z=1;
dian=0;
break;
case 52:
bar (x + 10, y + 80 + 53 * 2 + 10, x + 60 - 10, y + 80 + 53 * 3 - 4);
delay(8000);
init();
if (ch_z==0){
*e='4';e++;*e='\0';
outtextxy(x+30,y+40,emp);
}
else{
outtextxy(x+30,y+40,sum);
}
break;
case 53:
bar (x + 60 + 10, y + 80 + 53 * 2 + 10, x + 60 * 2 - 10, y + 80 + 53 * 3 - 4);
delay(8000);
init();
if (ch_z==0){
*e='5';e++;*e='\0';
outtextxy(x+30,y+40,emp);
}
else{
outtextxy(x+30,y+40,sum);
}
break;
case 54:
bar (x + 60 * 2 +10, y + 80 + 53 * 2 + 10, x + 60 * 3 - 10, y + 80 + 53 * 3 - 4);
delay(8000);
init();
if (ch_z==0){
*e='6';e++;*e='\0';
outtextxy(x+30,y+40,emp);
}
else{
outtextxy(x+30,y+40,sum);
}
break;
case 46:
bar (x + 60 * 3 + 10, y + 80 + 53 * 2 + 10, x + 60 * 4 - 10, y + 80 + 53 * 3 - 4);
delay(8000);
init();
if (dian==0){
if (ch_z==0){
*e='.';e++;*e='\0';
outtextxy(x+30,y+40,emp);
}
else{
outtextxy(x+30,y+40,sum);
}
}
else{
if (ch_z==0)
outtextxy(x+30,y+40,emp);
else
outtextxy(x+30,y+40,sum);
}
dian=1;
break;
case 55:
bar (x + 10, y + 80 + 53 * 3 + 10, x + 60 - 10, y + 80 + 53 * 4 - 4);
delay(8000);
init();
if (ch_z==0){
*e='7';e++;*e='\0';
outtextxy(x+30,y+40,emp);
}
else{
outtextxy(x+30,y+40,sum);
}
break;
case 56:
bar (x + 60 + 10, y + 80 + 53 * 3 + 10, x + 60 * 2 -10, y + 80 + 53 * 4 - 4);
delay(8000);
init();
if (ch_z==0){
*e='8';e++;*e='\0';
outtextxy(x+30,y+40,emp);
}
else{
outtextxy(x+30,y+40,sum);
}
break;
case 57:
bar (x + 60 * 2 + 10, y + 80 + 53 * 3 + 10, x + 60 * 3 - 10, y + 80 + 53 * 4 - 4);
delay(8000);
init();
if (ch_z==0){
*e='9';e++;*e='\0';
outtextxy(x+30,y+40,emp);
}
else{
outtextxy(x+30,y+40,sum);
}
break;
case 48:
bar (x + 60 * 3 + 10, y + 80 + 53 * 3 + 10, x + 60 * 4 - 10, y + 80 + 53 * 4 - 4);
delay(8000);
init();
if (ch_z==0){
*e='0';e++;*e='\0';
outtextxy(x+30,y+40,emp);
}
else{
outtextxy(x+30,y+40,sum);
}
break;
case 32:
emp[0]='\0';
sum[0]='\0';
e=emp;
s=sum;
ch='0';
ch_z=0;
dian=0;
init();
break;
case 8:
delay(8000);
for(i=0;i<=79;i++){
if (emp[i]=='\0')
break;
}
if (i==0)
break;
if (i!=79&&i!=0){
i--;
emp[i]='\0';
e=&emp[i];
}
init();
outtextxy(x+30,y+40,emp);
break;
}
}
}
/*---------------------------------------------------------------------*/
void init(void){
int x, y, x1, y1, i, j;
char emp;
x = (getmaxx() / 2) - 120;
y = (getmaxy() / 2) - 150;
x1 = (getmaxx() / 2) + 120;
y1 = (getmaxy() / 2) + 150;
cleardevice();
setbkcolor(3);
setfillstyle(1, 15);
setcolor(15);
settextstyle(1,0,1);
rectangle (x, y, x1, y1);
rectangle (x - 7, y - 7, x1 + 7, y1 + 7);
rectangle (x + 10, y + 10, x1 - 10, y + 80 - 10);
line (x, y + 80, x1, y + 80);
y = y + 80;
for (j = 1; j <= 4; j++){
x = (getmaxx() / 2) - 120;
for (i = 1; i <= 4; i++){
/* bar (x + 10, y + 10, x + 60 - 10, y + 60 - 10);*/
rectangle(x + 10, y + 10, x + 60 - 10, y + 60 - 10);
if (j == 1){
if (i == 1)
outtextxy(x + 20, y + 20, "/");
if (i == 2)
outtextxy(x + 25, y + 20, "*");
if (i == 3)
outtextxy(x + 27, y + 20, "-");
if (i == 4)
outtextxy(x + 25, y + 20, "+");
}
if (j == 2){
if (i == 1)
outtextxy(x + 25, y + 20, "1");
if (i == 2)
outtextxy(x + 25, y + 20, "2");
if (i == 3)
outtextxy(x + 25, y + 20, "3");
if (i == 4)
outtextxy(x + 25, y + 20, "=");
}
if (j == 3){
if (i == 1)
outtextxy(x + 25, y + 20, "4");
if (i == 2)
outtextxy(x + 25, y + 20, "5");
if (i == 3)
outtextxy(x + 25, y + 20, "6");
if (i == 4)
outtextxy(x + 25, y + 20, ".");
}
if (j == 4){
if (i == 1)
outtextxy(x + 25, y + 20, "7");
if (i == 2)
outtextxy(x + 25, y + 20, "8");
if (i == 3)
outtextxy(x + 25, y + 20, "9");
if (i == 4)
outtextxy(x + 25, y + 20, "0");
}
x = x + 60;
}
y = y + 53;
}
}
/*---------------------------------------------------------------------*/
int getkey(){
char lowbyte;
int press;
while(bioskey(1)==0);
press = bioskey(0);
press = press&0xff? press&0xff: press>>8;

return(press);

}
double strtoflt(char *p)
{
double rtl=0.000000000000;
double pnt=0.000000000000;
double t = 10;
int ispoint = 0;
while (*p!='\0'||*p!='.'){
if(*p<'0'||*p>'9')
break;
rtl*=10;
rtl+=*p-'0';
p++;
}
if (*p=='.'){
ispoint=1;
p++;
}
while(ispoint&&*p!='\0'){
pnt+=(double)(*p-'0')/t;
t*=10;
p++;
}
rtl+=pnt;
return (rtl);
}
/*-----------------------------------------------------------------------*/
void clear_z(char u[]){
int i;
for(i=strlen(u)-1;i>=0;i--){
if (u[i]!='0')
break;
}
if (u[i]=='.'){
u[i]='\0';
}
else{
i++;
u[i]='\0';
}
}.