// Geometry_Calculator.cpp
// DATE : 21st Jan., 2010
#include <iostream>
#include <iomanip>
#ifdef __UNIX__ /* UNIX, LINUX, MAC */
#define CLEARSCREEN "clear"
#else /* WINDOWS */
#define CLEARSCREEN "cls"
#endif
using namespace std;
typedef void (fCalcAreaOf) (void);
typedef fCalcAreaOf * pfCalcAreaOf;
fCalcAreaOf Circle, Rectangle, Triangle;
template <class number> number AskSafeNumberOfUser();
void DisplayMenu();
enum commands {CIRCLE=1, RECTANGLE, TRIANGLE, QUIT};
const int NUMOFMENUS = 4;
const float PI = 3.14159;
const char * MENU [NUMOFMENUS] =
{
"1. Calculate the Area of a Circle",
"2. Calculate the Area of a Rectangle",
"3. Calculate the Area of a Triangle",
"4. Quit"
};
const pfCalcAreaOf CalcAreaOf[NUMOFMENUS] =
{
&Circle, &Rectangle, &Triangle, NULL
};
int main()
{
int shape;
while (1)
{
system(CLEARSCREEN);
DisplayMenu();
cin >> shape;
if(!cin)
{
cin.clear();
cin.ignore(numeric_limits<std::streamsize>::max(),\'\\n\');
cout << "Wrong Command - Try again." << endl;
}
else if ( shape < CIRCLE || shape > TRIANGLE )
{
if( shape == QUIT )
{
cout << "Thanks for playing." << endl;
break;
}
else
{
cin.ignore(numeric_limits<std::streamsize>::max(),\'\\n\');
cout << "Wrong command - Try again. " << endl;
}
}
else
{
cout << MENU[shape-1] << endl;
cout << "---------------------------------" << endl;
CalcAreaOf[shape-1]();
}
cin.get();
}
cin.get();
return 0;
}
void Circle()
{
float radius;
cout << "Enter a radius : ";
radius = AskSafeNumberOfUser<float>();
cout << fixed << setprecision(4) << "Circle Area of " << radius
<< " radius is " << PI * radius * radius << endl;
}
void Rectangle()
{
float length, width;
cout << "Enter a length : ";
length = AskSafeNumberOfUser<float>();
cout << "Enter a width : ";
width = AskSafeNumberOfUser<float>();
cout << fixed << setprecision(4) << "Rectangle Area of " << length
<< " length * " << width << " width is "
<< length * width << endl;
}
void Triangle()
{
float base, height;
cout << "Enter a base : ";
base = AskSafeNumberOfUser<float>();
cout << "Enter a height : ";
height = AskSafeNumberOfUser<float>();
cout << fixed << setprecision(4) << "Triangle Area of " << base
<< " base * " << height << " height is "
<< base * height / 2 << endl;
}
void DisplayMenu()
{
int i=0;
for(i=0;i<NUMOFMENUS;i++)
cout << MENU[i] << endl;
cout << endl << "Enter your choice (1 - 4): ";
}
template <class number> number AskSafeNumberOfUser()
{
number command;
while (!(cin >> command))
{
cin.clear();
cin.ignore(numeric_limits<std::streamsize>::max(),\'\\n\');
cout << "Wrong Number - Try again." << endl;
}
cin.ignore(numeric_limits<std::streamsize>::max(),\'\\n\');
return command;
}
예상댓글: enum {몰라, 껒여, 병시나}
프갤이야기: c++?
댓글 영역
획득법
① NFT 발행
작성한 게시물을 NFT로 발행하면 일주일 동안 사용할 수 있습니다. (최초 1회)
② NFT 구매
다른 이용자의 NFT를 구매하면 한 달 동안 사용할 수 있습니다. (구매 시마다 갱신)
사용법
디시콘에서지갑연결시 바로 사용 가능합니다.