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1、一．题目请用Matlab编写程序，绘制一个时钟表盘和时针、分针、秒针，且时钟能根据计算机系统当前时间，自动更新时针、分针、秒针的位置。表盘和时针、分针、秒针使用plot函数绘制，计算机系统当前时间使用clock函数获取。二．操作方法与实验步骤（一）总体设计思想设计时钟，根据适中的样式先画出表盘，根据数学公式画出时分刻度以及时针分针，再根据clock函数读取计算机当前时间，最后加上循环语句让时钟走起来。（二）所用到的数学公式1.绘制表盘（圆）：x=cos(theta1);y=sin(theta1);2.绘制时分刻度：Pl
2、ot([0.9*cos(theta3(i)),0.97*cos(theta3(i))],[0.9*sin(theta3(i)),0.97*sin(theta3(i))]);3.绘制时针分针：theta_h=0.5*pi-(h+m/60)/12*2*pi;plot([0,0.6*cos(theta_h)],[0,0.6*sin(theta_h)],'blue','linewidth',2);theta_m=0.5*pi-m/60*2*pi;plot([0,0.7*cos(theta_m)],[0,0.7*sin(thet
3、a_m)],'cyan','linewidth',2);theta_s=0.5*pi-(s/60)*2*pi;plot([0,0.85*cos(theta_s)],[0,0.85*sin(theta_s)],'black','linewidth',2)4.clock读取计算机当前时间：C=clock;h=C(4);m=C(5);s=C(6);（三）程序流程图开始用极坐标与直角坐标的关系绘制圆盘：theta1=0:2*pi/100:2*pi;x=cos(theta1);y=sin(theta1);h=plot(x,y);
4、i=1；j=1;8i<=12NY绘制时刻度线：plot([0.8*cos(theta2(i)),0.97*cos(theta2(i))],[0.8*sin(theta2(i)),0.97*sin(theta2(i))]);i++j<=12Y绘制分刻度线：plot([0.9*cos(theta3(i)),0.97*cos(theta3(i))],[0.9*sin(theta3(i)),0.97*sin(theta3(i))]);set(h,'color','black');8j++读取计算机当前时间并画出时分秒针：C=c
5、lock;h=C(4);m=C(5);s=C(6);theta_h=0.5*pi-(h+m/60)/12*2*pi;plot([0,0.6*cos(theta_h)],[0,0.6*sin(theta_h)],'blue','linewidth',2);theta_m=0.5*pi-m/60*2*pi;plot([0,0.7*cos(theta_m)],[0,0.7*sin(theta_m)],'cyan','linewidth',2);theta_s=0.5*pi-(s/60)*2*pi;plot([0,0.85*c
6、os(theta_s)],[0,0.85*sin(theta_s)],'black','linewidth',2);加上循环使表走起来：while（1）结束（一）实验代码1.利用极坐标与直角坐标的关系绘制圆。theta1=0:2*pi/100:2*pi;x=cos(theta1);y=sin(theta1);8h=plot(x,y);%绘制圆set(h,'linewidth',6)%设置圆的属性holdon%保留已经绘制的图形axisequal%是横纵坐标系的单位长度相同1.绘制时刻度线与分刻度线theta2=0:2*
7、pi/12:2*pi;fori=1:length(theta2)%循环语句绘制时刻度线h=plot([0.8*cos(theta2(i)),0.97*cos(theta2(i))],[0.8*sin(theta2(i)),0.97*sin(theta2(i))]);set(h,'linewidth',3)set(h,'color','black')endtheta3=0:2*pi/60:2*pi;fori=1:length(theta3)%循环语句绘制分刻度线h=plot([0.9*cos(theta3(i)),0.9
8、7*cos(theta3(i))],[0.9*sin(theta3(i)),0.97*sin(theta3(i))]);set(h,'color','black')end81.绘制时针分针并读取计算机当前时间C=clock;%调用clock函数读取当前时间h=C(4);%clock函数：[yearmonthdayhourminut
