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// app7_6, 在类内部调用method class CCircle // 定义类CCircle { double pi=3.14; // 将数据成员赋值初值

// app7_5, 圆形类CCircle的field在内存中的配置关系 class CCircle // 定义类CCircle { double pi=3.14; // 将数据成员赋值初值

// app7_10, 圆形类CCircle class CCircle // 定义类CCircle { double pi=3.14; // 将数据成员设置初值

t=0:pi/10:3*pi; t=abs(exp(-0.25*t).*sin(t)); [x,y,z]=cylinder(t,30); surf(x,y,z);

%例10.4Sa(t)的过采样及重构； wm=1; wc=1.1*wm; Ts=0.7*pi/wm; ws=2*pi/Ts; n=-100:100; nTs=n*Ts f=sinc(nTs/pi); Dt=0.005;t=-15:Dt:15; fa=f*Ts*wc/pi*sinc((wc/pi)*(ones(length(nTs),1)*t-nTs'*ones(1,length

%例10.3Sa(t)的临界采样及重构； wm=1; wc=wm; Ts=pi/wm; ws=2*pi/Ts; n=-100:100; nTs=n*Ts f=sinc(nTs/pi); Dt=0.005;t=-15:Dt:15; fa=f*Ts*wc/pi*sinc((wc/pi)*(ones(length(nTs),1)*t-nTs'*ones(1,length(t))));

%例10.5Sa(t)的欠采样及重构； wm=1; wc=wm; Ts=1.5*pi/wm; ws=2*pi/Ts; n=-100:100; nTs=n*Ts f=sinc(nTs/pi); Dt=0.005;t=-15:Dt:15; fa=f*Ts*wc/pi*sinc((wc/pi)*(ones(length(nTs),1)*t-nTs'*ones(1,length(t))

%例9.14付里叶变换的时域微分特性； r=0.01; t=-5:r:5; f1=Heaviside(t+pi)-Heaviside(t-pi); f2=Heaviside(t+pi)-2*Heaviside(t)+Heaviside(t-pi); f=pi/2*(sawtooth(t+pi,0.5)+1).*f1; w1=2*pi*5; N=200; k=-N:N; w=k*w

x=0:1/4:2*pi; y=sin(x); hp=plot(x,y,'r-diamond') ht=gtext('初始的标注')

#include #include using namespace std; int main ( ) {float h,r,l,s,sq,vq,vz; const float pi=3.1415926; coutr>>h; l=2*pi*r; s=r*r*pi; sq