水果自动装箱生产线系统用PLC编程
我会啊 就是这样对不起，帮不上你。
Java 圆类编程
//sorry import java.awt.canvas; import java.awt.color; import java.awt.graphics;public class mypaint extends canvas {int srcx, srcy, destx, desty;public int getdestx() {return destx;}public void setdestx(int destx) {this.destx = destx;}public int getdesty() {return desty;}public void setdesty(int desty) {this.desty = desty;}public int getsrcx() {return srcx;}public void setsrcx(int srcx) {this.srcx = srcx;}public int getsrcy() {return srcy;}public void setsrcy(int srcy) {this.srcy = srcy;}public mypaint() {}public void paint(graphics g) {for (int i=0;i<100;i++){color c = new color((int) (math.random() * 255), (int) (math.random() * 255), (int) (math.random() * 255));g.setcolor(c);int srcx=(int)(math.random() * 800);int srcy=(int)(math.random() * 600);int destx=(int)(math.random() * 800);int desty = (int)(math.random() * 600);g.drawline(srcx, srcy, destx, desty);try {thread.sleep(1000) ;} catch (interruptedexception e) {e.printstacktrace();}}}
初学者求助 C语言编程 输入圆的半径 r ，计算圆的周长和面积 。其中 π =3.1416
#define PI 3.1416;这个后面不要分号
