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// Section 7.3.1 // $ CC ptrswap.cpp main3_1b.cpp /* Before ptrswap(): pi: 10 pj: 20 After ptrswap(): pi: 20 pj: 10 */ #include using std::cout; using std::en

// #include // #include #include #include #include /***** pi: 4 *pi: 4 st1: 12 st2: 12 ps: 4 *ps: 12 short : 2 short* : 4

// Example 4-7：求π的近似值 #include #include void main() { int s = 1; double n = 1.0, u = 1.0, pi = 0.0; while(fabs(u)>=1e-4) { pi = pi+u; n = n+2; s = -s; u =

#include "stdio.h" #include "13kfft.c" #include "math.h" main() { int i,j; double pr[64],pi[64],fr[64],fi[64]; for (i=0; i

t=0:pi/20:2*pi; y1=sin(t); y2=cos(t); figh=figure('Position',[30,100,800,350]); axes('GridLineStyle','-.','XLim',[0,2*pi],'YLim',[-1,1]); line('XData',t,'YData',y1,'LineWidth',2); line(t,y2); g

clf; %清除图形窗口中的内容 x=linspace(0,2*pi,20); y=sin(x); axes('Position',[0.2,0.2,0.2,0.7],'GridLineStyle','-.'); plot(y,x); grid on axes('Position',[0.4,0.2,0.5,0.5]); t=0:pi/1

x=linspace(0,2*pi,60); y=sin(x); hf=figure('Color',[0,1,0],'Position',[1,1,450,250],... 'Name','我的图形窗口','NumberTitle','off','MenuBar','none',... 'KeyPressFcn', 'plot(x,y);axis([0

x=linspace(0,2*pi,1000); y1=0.2*exp(-0.5*x).*cos(4*pi*x); y2=2*exp(-0.5*x).*cos(pi*x); k=find(abs(y1-y2)

x=-pi:.1:pi; y=sin(x); y1=sin(x); y2=cos(x); h=line(x,y1,'LineStyle',':','Color','g'); line(x,y2,'LineStyle','--','Color','b'); xlabel('-\pi \leq \Theta \leq \pi') ylabel('sin(\Theta)') title(

N=128; % 采样点数 T=1; % 采样时间终点 t=linspace(0,T,N); % 给出N个采样时间ti(I=1:N) x=12*sin(2*pi*10*t+pi/4)+5*cos(2*pi*40*t); % 求各采样点样本值x dt