2份之PI是:MathHelper.PIOver24份之PI是:MathHelper.PIOver42倍的PI是:MathHelper.TwoPI
c语言时钟程序代码如下:include<windows.h>include<math.h>defineID_TIMER1//计时器IDdefineTWOPI(2*3.14159)LRESULTCALLBACKWndProc(HWND,UINT,WPARAM,LPARAM);intWINAPIWinMain(HINSTANCEhInstance,HINSTANC...
{arr[i].x=300+redius*sin(((1.0*i)/1000)*TWOPI);arr[i].y=300+redius*cos(((1.0*i)/1000)*TWOPI);;}for(i=0;i<999;i++)line(arr[i].x,arr[i].y,arr[i+1].x,arr[i+1].y);getch()...
用正弦波产生方波twopi_fc_t=2*pi*fm*t;A=1;phi=0;x=A*cos(twopi_fc_t+phi);方波am=1;x(x>0)=am;x(x<0)=-1;figure(1)plot(t,x);axis([02e-4-22]);title('等概二进制信源')...
RotatePoint(POINTpt[],intiNum,intiAngle){inti;POINTptTemp;for(i=0;i<iNum;i++){ptTemp.x=(int)(pt[i].x*cos(TWOPI*iAngle/360)+pt[i].y*sin(TWOPI*iAngle/360));...
我将数字日期显示为窗口标题,在vc++6.0新建--win32application项目,然后新建一个C++文件输入如下代码include<windows.h>include<math.h>defineTWOPI(2*3.14159)defineIDTIMER1defineANGLETWOPI/360...
apt[i].y=(int)(cyClient/2*(1-sin(TWOPI*i/NUM)));}Polyline(hdc,apt,NUM);return0;caseWM_DESTROY:PostQuitMessage(0);return...
(int)是强制取整丢掉小数部分pt[i].x*cos(TWOPI*iAngle/360)是数组pt中的第i个元素中的成员x的数值乘上cos(TWOPI*iAngle/360)pt[i].y*sin(TWOPI*iAngle/360)意义类似这里注意前面的(int)下面一句话...
apt[i].y=(int)(cyClient/2*(1-sin(TWOPI*i/NUM)));}Polyline(hdc,apt,NUM);return0;caseWM_DESTROY:PostQuitMessage(0);return0;}returnDefWindowProc(hwnd,message...
pt[i].x*sin(TWOPI*iAngle/360));//转换成旋转后的y坐标pt[i]=ptTemp;//新的点结构体替换原来的点结构体}}voidDrawClock(HDChdc)//用来画出时钟周围的点{intiAngle;POINTpt[3];for(...