easyX 绘制坐标系

.h

#pragma once
#include<graphics.h>class Graph {
    
public://颜色static unsigned long int COLOR_BLUE;//蓝色static unsigned long int COLOR_BLACK;//黑色static unsigned long int COLOR_RED;//红色static unsigned long int COLOR_GREEN;//绿色/******0 初始化类******/Graph(int windowWidth, int windowHigh); //创建一个画图窗口void drawCoordinateAxis(int xLimit, int yLimit, int xStep, int yStep); //画坐标轴/******1 画点类******/void drawPoint(int x, int y, int yLimit); //画点void setPointColor(unsigned long int color); //设置点颜色private:int windowHigh, windowWidth, windowPadding;//窗口高、宽、边界厚度 int lineWidth;//线宽unsigned long int lineColor, textColor, pointColor;//线、文本、点颜色int xScale, yScale;//比例尺double baseLengthX, baseLengthY;//两个坐标轴刻度的图上距离
};

.cpp

#include "MMW_ConfigureDlg.h"
#include<easyx.h>
#include<conio.h>
#include "stdio.h"unsigned long int Graph::COLOR_BLUE = BLUE;
unsigned long int Graph::COLOR_BLACK = BLACK;
unsigned long int Graph::COLOR_RED = RED;
unsigned long int Graph::COLOR_GREEN = GREEN;Graph::Graph(int windowWidth, int windowHigh) {
    this->windowWidth = windowWidth;this->windowHigh = windowHigh;windowPadding = 50;//直线默认属性lineColor = BLACK;textColor = BLACK;lineWidth = 2;initgraph(windowWidth, windowHigh); // 初始化窗口setbkcolor(WHITE);cleardevice();
}/*xLimit X坐标轴代表的实际长度yLimit y坐标轴代表的实际长度xStep X轴两个刻度间的实际长度yStep y轴两个刻度间的实际长度xLimit / xStep X坐标轴被分成多少段yLimit / yStep y坐标轴被分成多少段 */
void Graph::drawCoordinateAxis(int xLimit, int yLimit, int xStep, int yStep) {
    xScale = (windowWidth - 2 * windowPadding) / xLimit; //比例尺yScale = (windowHigh - 2 * windowPadding) / yLimit;baseLengthX = (windowWidth - 2 * windowPadding) / (xLimit / xStep);//图上两个刻度间距baseLengthY = (windowHigh - 2 * windowPadding) / (yLimit / yStep);setlinecolor(lineColor);setlinestyle(PS_SOLID | PS_JOIN_BEVEL, lineWidth);settextcolor(BLACK);line(windowPadding, windowHigh - windowPadding, windowPadding + xLimit / xStep * baseLengthX, windowHigh - windowPadding);//横轴line(windowPadding + xLimit / xStep * baseLengthX / 2, windowHigh - windowPadding,windowPadding + xLimit / xStep * baseLengthX / 2,windowHigh - (windowPadding + yLimit / yStep * baseLengthY));//竖轴//windowPadding);#if(1)/*横轴刻度绘制*/for (int i = 0; i <= xLimit; i += xStep) {
    TCHAR c[20];_stprintf_s(c, _T("%d"), i-xLimit/2);outtextxy(windowPadding + i * xScale, windowHigh - (windowPadding - 10), c);}/*竖轴刻度绘制*/for (int i = yStep; i <= yLimit; i += yStep) {
    TCHAR c[20];_stprintf_s(c, _T("%d"), i);outtextxy(windowPadding + xLimit / xStep * baseLengthX / 2 + 5, windowHigh - (windowPadding + i * yScale), c);}
#endif
}void Graph::drawPoint(int x, int y, int yLimit)
{
    setfillcolor(pointColor);fillcircle(windowPadding + x * xScale + xLimit * xScale / 2, windowHigh - (windowPadding + y * yScale), 3);
}void Graph::setPointColor(unsigned long int color)
{
    pointColor = color;setfillcolor(color);setlinecolor(color);
}

main.cpp

//#include<stdio.h>
#include "MMW_ConfigureDlg.h"
//#include <iostream>
//#include "stdlib.h"
//#include "process.h"
#include "conio.h"void test01() {
    Graph graph = Graph(800, 640);graph.drawCoordinateAxis(20, 20, 2, 1);//结合窗口合理设置(?-﹏-`；)graph.setPointColor(Graph::COLOR_RED);//设置点颜色for (int i = 0; i < 4; i++) {
    graph.drawPoint(i, i,20);Sleep(200);}
}int main(){
    test01();_getch();//Sleep(3000);//system("pause");//std::cin.get();//getchar();return 0;
}

运行效果：