[英]Why does my program output a huge decimal?
好的,所以我創建了一個模擬景觀公司的程序,因此我們必須計算Sod和圍欄的成本。 因此,當我同時輸入長度和寬度時,他們會輸出大小數字
Parkton Landscaping
Enter Length: 10
Enter width: 12
Lanscaping Costs
Sod = 6871947680.00
Fence = 19327352760.00
Press any key to continue . . .
假設Sod = 56.40,並且假設Fence = 990.00
請幫助這里是我的代碼和兩個文件
#include <iostream>
#include <iomanip>
using namespace std;
#include "c:\Users\barta\OneDrive\Documents\Visual Studio 2015\Projects\Project 6\Project 6\Geometry.h"
#include "Pricing.h"
int main()
{
int length, width;
Pricing landscape;
Geometry geo;
const double Fenceprice = 22.50;
const double Sodprice = .47;
cout << "\t Parkton Landscaping " << endl;
cout << "Enter Length: ";
cin >> length;
cout << "Enter width: ";
cin >> width;
//Pricing(length, width);
//geo.getLength();
//geo.getWidth();
std::cout << std::fixed << std::setprecision(2);
landscape.displayOutput();
cout << "Sod = " << landscape.getsodCost(length) << endl;
cout << "Fence = " << landscape.getFenceCost(Fenceprice) << endl;
system("pause");
return 0;
}
這是頭文件:
#pragma once
class Geometry
{//an object is how you access the class
public:// where the public function definitions are created
Geometry();// Default Constructor
Geometry(int, int);
Geometry(int);
void setLength(int); //assigns length
void setWidth(int); //assigns width
void setSide(int); //assigns side
//Constructor function that recieves the values for the rectangle
//Constructor function that recieves values for the cube
int getLength(),
getWidth(),
getSide(),
getArea(),
getPerimeter(),
getSurfaceArea();
private: //where the private members are created
int length,
width,
side;
void checkNum(int); //function that checks to see if the number is less than 0
};
Geometry::Geometry()
{
length = length;
width = width;
side = 0;
}
Geometry:: Geometry(int length, int width) /*function recieves 2 intergers and calls checkNum to validate if */
{
setLength(length);
setWidth(width);
checkNum(length);
checkNum(width);
}
Geometry:: Geometry(int sides)
{
checkNum(sides);
setSide(sides);
}
int Geometry::getLength()
{
return length;
}
int Geometry::getWidth()
{
return width;
}
int Geometry::getSide()
{
return side;
}
int Geometry::getArea()
{
return length * width;
}
int Geometry::getPerimeter()
{
return 2 * (length + width);
}
int Geometry::getSurfaceArea()
{
return 6 * (side * side);
}
void Geometry::setLength(int len)
{
length = len;
checkNum(len);
}
void Geometry::setWidth(int widths)
{
width = widths;
checkNum(widths);
}
void Geometry::setSide(int s)
{
side = s;
checkNum(s);
}
void Geometry::checkNum(int num) //function checks to see if the number is less than zero
{
if (num <= 0)
{
cout << "!!!!!!!!WARNING!!!!!! this isnt a number" << " program will now exit......" << endl;
system("pause");
exit(1);
}
}
頭文件#2
#include "Geometry.h"
class Pricing : Geometry
{
public:
Pricing();
Pricing(int length, int width);
double getsodCost(double);
double getFenceCost(double);
void displayOutput();
private:
};
Pricing::Pricing(int length, int width) :Geometry(length, width)
{
}
Pricing::Pricing()
{
}
double Pricing::getsodCost(double price)
{
getArea();
return getArea()*price;
}
double Pricing::getFenceCost(double price)
{
getPerimeter();
return getPerimeter()*price;
}
void Pricing::displayOutput()
{
cout << "\n\n";
cout << "\t Lanscaping Costs " << endl;
}
因為您永遠不會使用有效值初始化對象,這意味着Geometry::width
和Geogrpapy::length
未初始化且具有不確定的值。 使用它們未初始化會導致未定義的行為 。
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