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C语言 moverel()用法及代码示例


头文件graphics.h包含moverel()函数,该函数将一个点从当前位置(x_pos1,y_pos1)移动到与当前位置相距相对(x,y)的点,然后将当前位置前进(x, y)。注意:getx和gety可用于查找当前位置。

用法:

moverel(int x, int y);

The end position is calculated as:
x_pos2 = x_pos1 + x;
y_pos2 = y_pos1 + y;

例子:


Input:x_pos1 = 0, y_pos1 =0, x = 200, y = 100
Output:

Input:x_pos1 = 100, y_pos1 = 150, x = 150, y = 60
Output:

情况1:当当前位置为原点时,即(0,0)

下面是C中moverel()函数的实现:

// C Implementation for moverel() 
#include <graphics.h> 
#include<stdio.h> 
  
// driver code 
int main() 
{ 
    // gm is Graphics mode which is 
    // a computer display mode that 
    // generates image using pixels. 
    // DETECT is a macro defined in 
    // "graphics.h" header file 
    int gd = DETECT, gm; 
    char arr[100]; 
  
    // initgraph initializes the 
    // graphics system by loading a 
    // graphics driver from disk 
    initgraph(&gd, &gm, ""); 
  
    // moverel function 
    moverel(200, 100); 
  
    // sprintf stands for “String print”. 
    // Instead of printing on console, 
    // it store output on char buffer 
    // which are specified in sprintf 
    sprintf(arr, "Current x position = %d and "
             "y position = %d",getx(), gety()); 
  
    // outtext function displays 
    // text at current position. 
    outtextxy(100, 150, arr); 
  
    getch(); 
  
    // closegraph function closes the 
    // graphics mode and deallocates 
    // all memory allocated by 
    // graphics system . 
    closegraph(); 
  
    return 0; 
}

输出:


情况2:当前位置不是原点(100,150)时。

下面是C中moverel()函数的实现:

// C Implementation for moverel() 
#include <graphics.h> 
#include<stdio.h> 
  
// driver code 
int main() 
{ 
    // gm is Graphics mode which is 
    // a computer display mode that 
    // generates image using pixels. 
    // DETECT is a macro defined in 
    // "graphics.h" header file 
    int gd = DETECT, gm; 
    char arr[100]; 
  
    // initgraph initializes the 
    // graphics system by loading a 
    // graphics driver from disk 
    initgraph(&gd, &gm, ""); 
  
    // moveto function to change 
    // initial position 
    moveto(100, 150); 
  
    // moverel function 
    moverel(150, 60); 
  
    // sprintf stands for “String print”. 
    // Instead of printing on console, 
    // it store output on char buffer 
    // which are specified in sprintf 
    sprintf(arr, "Current x position = %d and "
             "y position = %d",getx(), gety()); 
  
    // outtext function displays 
    // text at current position. 
    outtextxy(100, 150, arr); 
  
    getch(); 
  
    // closegraph function closes the 
    // graphics mode and deallocates 
    // all memory allocated by 
    // graphics system . 
    closegraph(); 
  
    return 0; 
}

输出:




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注:本文由纯净天空筛选整理自Sahil_Bansall大神的英文原创作品 moverel() function in C。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。