| 发表于：2007-09-06 19:41:26 楼主 |
#include <process.h>
#include <iostream.h>
#include <conio.h>
#include <stdlib.h>
#include <math.h>
int number1,number2,answer,val;
class oopcalc{
public:
void calcadd（);
void calcsub（);
void calcdiv（);
void calcmult（);
void calcfartocel（);
void calcceltofar（);
void calcsroot（);
void exitprog（);
void menu（);
void badinput（);
private:
int add（int x,int y);
int sub（int x,int y);
int div（int x,int y);
int mult（int x,int y);
int fartocel（int x);
int celtofar（int x);
int sqroot（int x);
};
void oopcalc::calcadd（)
{
cout < < "the add function\n ";
cout < < "first number: ";
cin> > number1;
cout < < "second number: ";
cin> > number2;
answer=add（number1,number2);
cout < <number1 < < "+ " < <number2 < < "= " < <answer < <endl;
cout < < "press any key to continue\n ";
getch（);
menu（);
}
void oopcalc::calcsub（)
{
cout < < "the subtract function\n ";
cout < < "first number: ";
cin> > number1;
cout < < "second number: ";
cin> > number2;
answer=sub（number1,number2);
cout < <number1 < < "- " < <number2 < < "= " < <answer < <endl;
cout < < "press any key to continue\n ";
getch（);
menu（);
}
void oopcalc::calcdiv（)
{
cout < < "the divide function\n ";
cout < < "first number: ";
cin> > number1;
cout < < "second number: ";
cin> > number2;
answer=div（number1,number2);
cout < <number1 < < "/ " < <number2 < < "= " < <answer < <endl;
cout < < "press any key to continue\n ";
getch（);
menu（);
}
void oopcalc::calcmult（)
{
cout < < "the multiply function\n ";
cout < < "first number: ";
cin> > number1;
cout < < "second number: ";
cin> > number2;
answer=mult（number1,number2);
cout < <number1 < < "x " < <number2 < < "= " < <answer < <endl;
cout < < "press any key to continue\n ";
getch（);
menu（);
}
void oopcalc::calcfartocel（)
{
cout < < "the farenheit to celsius function\n ";
cout < < "enter a tempature in farenheit: ";
cin> > number1;
answer=fartocel（number1);
cout < < "the tempature in celsius is " < <answer < <endl;
cout < < "press any key to continue\n ";
getch（);
menu（);
}
void oopcalc::calcceltofar（)
{
cout < < "the celsius to farenheit function\n ";
cout < < "enter a tempature in celsius: ";
cin> > number1;
answer=celtofar（number1);
cout < < "the tempature in farenheit is " < <answer < <endl;
cout < < "press any key to continue\n ";
getch（);
menu（);
}
void oopcalc::calcsroot（)
{
cout < < "the square root function\n ";
cout < < "first number: ";
cin> > number1;
answer=sqroot（number1);
cout < < "the square root of " < <number1 < < "is " < <answer < <endl;
cout < < "press any key to continue\n ";
getch（);
menu（);
}
void oopcalc::exitprog（)
{
exit（-1);
}
void oopcalc::menu（)
{
char input;
oopcalc a;
system（ "cls ");
cout < < "==================menu===============\n ";
cout < < "1:add two numbers\n ";
cout < < "2:subtract two numbers\n ";
cout < < "3:divide two numbers\n ";
cout < < "4:multiply two numbers\n ";
cout < < "5:convert farenheit to celsius\n ";
cout < < "6:convert celsius to farenheit\n ";
cout < < "7:find the square root of a number\n ";
cout < < "8:exit this program\n ";
cout < < "choice: ";
cin> > input;
cout < < "==========================================\n ";
switch（input)
{
case '1 ': a.calcadd（);
break;
case '2 ': a.calcsub（);
break;
case '3 ': a.calcdiv（);
break;
case '4 ': a.calcmult（);
break;
case '5 ': a.calcfartocel（);
break;
case '6 ': a.calcceltofar（);
break;
case '7 ': a.calcsroot（);
break;
case '8 ': a.exitprog（);
break;
default: a.badinput（);
}
}
void oopcalc::badinput（)
{
cout < < "bad input!\n ";
cout < < "press any key to continue\n ";
getch（);
menu（);
}
int oopcalc::add（int x,int y)
{
val=x+y;
return val;
}
int oopcalc::sub（int x,int y)
{
val=x-y;
return val;
}
int oopcalc::div（int x,int y)
{
val=x/y;
return val;
}
int oopcalc::mult（int x,int y)
{
val=x*y;
return val;
}
int oopcalc::fartocel（int x)
{
int cel =（（x-32)*5)/9;
return cel;
}
int oopcalc::celtofar（int x)
{
int f;
f=x*9/5+32;
return f;
}
int oopcalc::sqroot（int x)
{
int g=sqrt（x);
return g ;
}
void main（)
{
oopcalc s;
s.menu（);
}
这是模仿写的一个计算器吧 现在要对实数操作是不是就是把int 改为 double啊？
里面的计算都是只有两个数，如果要对多操作数进行计算，怎么改啊？
如果要在主菜单里加一个实现混合四则运算并有检测功能，增加函数就可以了，怎么添加阿？能不能给个代码看看啊？ |
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