用C语言实现画图程序.doc

一、选题背景：画图程序，通过画图中的功能绘制出美丽的图案。二、设计思想：利用数学三角函数制作山峰和花朵出一条曲线、用画圆函数绘制太阳的形状、再进行颜色填充用绘制直线的函数来绘制比较粗的光线、用矩形函数画出矩形的边框、再画地球、直线画赤道、弧线画南北极和钟表的刻度盘。三、流程图 ：开 始main()主函数调用图形库函数includegraphics.h调用数学函数()math.h调用标准I/O函数()stdio.h宏定义PI字符串()define PI 3.141596for循环输出图形结 束四、程序清单：#includegraphics.h /*调用图形库函数*/#includemath.h /*调用数学函数*/#includestdio.h /*调用标准I/O函数*/#define PI 3.141596 /*宏定义PI字符串*/ main() /*主函数*/ float i,x,y; /*定义单精度浮点型变量i,x,y*/ int gdriver=DETECT,gmode,a=1; /*定义整型变量gdriver,gmode*/ initgraph(&gdriver,&gmode,d:tc); /*定义变量后,初始化图形系统*/ cleardevice(); setbkcolor(a); /*背景颜色*/ printf(n); printf(n); /*C 语言图形函数*/ printf(n); printf( the following math functions were used in the main function.n); printf( setbkcolor(int color);n); /* 背景颜色*/ printf( setcolor(int color);n); /* 画笔颜色*/ printf( putpexel(x,y,color);n); /* 画像素点*/ printf( line(x1,y1,x2,y2)n); /* 直线函数*/ printf( rectangle(xl,yt,xr,yb)n); /* 矩形函数*/ printf( arc(x,y,as,ae,r)n); /* 圆弧函数*/ printf( circle(x,y,r)n); /*圆形函数*/ printf( ellipse(x,y,as,ae,rx,ry)n); /* 椭圆函数*/ printf(n); printf(n); /* 按任意键开始演示*/ setcolor(2); setlinestyle(0,0,3); rectangle(4,4,635,475); /*绘制矩形框*/ getch(); cleardevice(); printf(n); /* 模拟手工画图*/ printf(n); /* 函数曲线图形*/ setcolor(3); setlinestyle(3,3,3); rectangle(4,4,635,475); /*绘制图纸边框*/ for (i=0;i=2*PI;i+=PI/99999) putpixel(40*i,170-21*i*sin(1.6*i),2);putpixel(40.3*i,170-22*i*sin(1.6*i),3);putpixel(40.6*i,170-23*i*sin(1.6*i),10); for (i=0;i=2*PI;i+=PI/99999) /*绘制花朵*/ putpixel(118-15*cos(4*i)*cos(i),160-15*cos(4*i)*sin(i),14); putpixel(118-25*cos(4*i)*cos(i),160-25*cos(4*i)*sin(i),13); putpixel(118-35*cos(4*i)*cos(i),160-35*cos(4*i)*sin(i),10); for (i=0;i=PI;i+=PI/99999) putpixel(320-315*cos(i),360-95*sin(i),11); /*绘制拱桥*/putpixel(320-315*cos(i),360-96*sin(i),11); /*绘制拱桥*/putpixel(320-315*cos(i),360-97*sin(i),11); /*绘制拱桥*/ for (a=70;a=570;a+=50) for (i=0;i=PI;i+=PI/9999) putpixel(a-25*cos(i),360-40*sin(i),11); /*绘制桥*/ for (x=0;x=640;x+=0.001) putpixel(8*x,380-8*sin(x),9); /*绘制曲线水流*/ for (x=0;x=600;x+=0.001) putpixel(10*x,405-10*sin(x),9); /*绘制曲线水流*/ for (x=0;x=560;x+=0.001) putpixel(12*x,430-12*sin(x),9); /*绘制曲线水流*/ for(x=60;x=80;x+=0.01) ellipse(270,360,180 ,0,160-x,25); for (x=0;x=250;x-=0.0001) putpixel(x,60,12); /*绘制阳光线*/ for (x=360;x=390;x+=0.0001) putpixel(x,60,12); /*绘制阳光线*/ for (y=24;y=12;y-=0.0001) putpixel(320,y,12); /*绘制阳光线*/ for (y=96;y=108;y+=0.0001) putpixel(320,y,12); /*绘制阳光线*/ setlinestyle(3,0,1); setcolor(12); for (i=0;i=2*PI;i+=PI/12) /*绘制阳光线*/ line(320+40*cos(i),60-36*sin(i),320+70*cos(i),60-48*sin(i); for (x=0;x=55555;x+=0.1) y=y+x; /*延时控制*/ setcolor(13); setlinestyle(0,0,1); rectangle(460,100,620,200); /*绘制地图框(矩形)*/ setcolor(11); setlinestyle(0,0,3); ellipse(540,150,0,360,77,48); /*绘制地球(椭圆)*/ setcolor(10); setlinestyle(0,0,1); circle(540,150,46); /*绘制经线(圆形)*/ ellipse(540,100,210,330,45,16); /*绘制北极圈(椭圆弧)*/ ellipse(540,200,30,150,45,16); /*绘制南极圈(椭圆弧)*/ setcolor(14); setlinestyle(3,0,1); line(460,150,620,150); /*绘制赤道(水平线)*/ line(540,100,540,200); /*绘制经线(垂直线)*/ setcolor(11); setlinestyle(0,0,1); for (i=0;i=2*PI;i+=PI/300) putpixel(590-35*cos(i),50-35*sin(i),11); /*绘制0.1秒刻度*/ setcolor(14); setlinestyle(0,0,1); circle(590,50,2); /*绘制中心轴*/ setcolor(13); setlinestyle(0,0,3); for (i=0;i=2*PI;i+=PI/6) line(590+25*sin(i),50-25*cos(i),590+30*sin(i),50-30*cos(i); /*绘制小时*/ for (x=0;x=5555;x+=0.001) y=y+x; /*延时控制*/ getch(); closegraph(); 五、主要解决问题的方法及技术关键1、 主要问题及解决方法 抛物线的画法用插补法画抛物线。 调色