網格上的矩形

Question

這裏是一個由點組成的正方形，25 x 25網格的代碼。我需要從用戶x1，x2，y1，y2和兩個字符（例如@和/）獲取輸入，並創建一個矩形，其中一個字符填充內部，一個矩形畫出矩形。我不知道如何將這些輸入處理到循環中並創建所述矩形。 這是頭文件....

// Rectangle.h 

#ifndef Rectangle_h 
#define Rectangle_h 

#include <iostream> 
using namespace std; 

class Rectangle 
{ 
private: 
float length, width, perimeter, area; 
int a, i, j, h, x1, x2, y1, y2; 
char inner; 

public: 
Rectangle(); // default constructor 

void printGrid(); 
void setValues(); 
void setIntChar(); 


}; 

#endif 

這是源代碼....

void Rectangle::setValues() 
{ 
do 
{ 
    cout << "Enter x1, x2, y1, and y2 such that x1 < x2 and y1 < y2:\n"; 
    cin >> x1; 
    cin >> x2; 
    cin >> y1; 
    cin >> y2; 
} 
while(x1 >= x2 || y1 >= y2); 

cout << endl << "Rectangle accepted.\n\n"; 
} 

void Rectangle::setIntChar() 
{ 
cout << "Enter a character to fill the interior of the rectangle: \n" << endl; 
cin >> inner; 
cout << endl << endl; 
} 

void Rectangle::printGrid() 
{ 
for(i = 0; i < 25; i++) // prints 25 rows of 25 dots and a space after each dot 
{ 
    if(i < 16) 
    cout << 25 - i << " ";// prints 25 - 10 in descending order 

if(i > 15) 
    cout << 25 - i << " "; // prints 9 - 1 in descending order 

for(j = 0; j < 25; j++) // prints a line of 25 dots and 2 spaces after each dot 
    cout << ". "; 

for(h = 0; h < 25; h++) // prints a line of 25 double-spaces 
    cout << " "; 

cout << endl;  // ends the line after each iteration  
} 

cout << " "; 

for (i = 1; i <= 25; i++) 
{ 
    if(i < 10) 
     cout << i << " "; 

    if(i > 9) 
    cout << i << " "; 
} 

cout << endl << endl; 

}

這是主要的功能....

#include "Rectangle.h" 

///// main ///// 

int main() 
{ 
Rectangle grid; // creates an object of the Rectangle class 

grid.setValues(); 
grid.setIntChar(); 
grid.printGrid(); 
} 

Answer 1

嗯，我不知道你在C++中學到了多少東西，但看起來你正在使用類？什麼是Rectangle類的成員變量？據推測，這件事情就像

class Rectangle { 
    public: 
     Rectangle(); // constructor sets member variables to default values 
     void getInputFromUser(); // using stdout and stdin, prompts the user for x1, y1, x2, y2, line char, fill char, and sets the member variables to these values 
     void printGrid(); // uses member variables to determine how to print the grid 

     ... 

    private: 
     // private methods 

     ... 

     // private variables 

     int m_x1; 
     int m_x2; 
     int m_y1; 
     int m_y2; 
     char m_lineChar; 
     char m_fillChar; 

     // static constants 

     static const int kMinXValue; // set to 0 in the cpp file 
     static const int kMinYValue; // set to 0 in the cpp file 
     static const int kMaxXValue; // set to 25 in the cpp file 
     static const int kMaxYValue; // set to 25 in the cpp file 
}; 

所以，在你的類，你getInputFromUser（）的實現都將有一些代碼行像cout << "Please enter the top left corner's x value << endl;和cin >> m_x1;。

你實現printGrid的（）都將有一些代碼行像for(int y = kMinYValue; y < kMaxYValue; y++) { // iterate through the rows和if(y == m_y1 || y == m_y2) { // we need to print the m_lineChar value if the x value is in range

希望這回答你的問題夠你解決問題。如果您需要針對特定​​問題的具體幫助，您需要更具體地瞭解您所做的工作，您的代碼是什麼以及您的代碼問題。