((x)>eps?1:((x)

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((x)>eps?1:((x)
((x)>eps?1:((x)

((x)>eps?1:((x)
首先要了解一个语法,C语言里面的
x a :b
这个语法里,x是一个表达式,一般可以得到一个true或false的结果.
如果x的值是true,则整个语句返回a值,否则返回 b 值.
比如这个
y = 1 > 0 yes :no
因为1肯定大于0,所以返回yes ,即y的值是yes.
你那句话,不过就是把其中的b这个返回值,又嵌套了一个语句而已.
解释起来就是
如果x大于eps,就返回1,否则,如果x小于eps,就返回2,如果都不是,就返回0
这句话应该是预编译函数,所以x加上括号.eps就要看上下文了.

((x)>eps?1:((x) #define zero(x) (((x) > 0 (x) :(-x)) < eps) 是什么作用? 输入x和正数eps,计算多项式1-x+x*x/2!-x*x*x/3!+...的和直到末位的数的绝对值小于eps为止.求程序 C语言编程求解.好人平安..输入 x 和正数eps,计算多项式:..祥见补输入 x 和正数eps,计算多项式:1-x+x^2/2!-x^3/3!+x^4/4!-x^5/5!+…… 的和,直到末项的绝对值小于eps为止.每组输入数据占一行,先输入x, matlab运行出错 x = 1:10:1000;y = -500:10:500;C=14831./(pi.*0.314278.*x.^0.876088.*0.057025.*x.^1.0935.*1.72+eps).*exp(-0.5.*(y./(0.314278.*x.^0.876088+eps)).^2).*exp(-0.5.*(80./( 0.057025.*x.^1.0935+eps)).^2);mesh(X,Y,C); 程序运行提示Error 用scilab编的程序,二分法求值的functionB=f(a,b,eps,p)A=p(a); B=A;while (abs(b-a)> eps|abs(B)>eps)x=(a+b)/2B=p(x);if(B==0),break;else if(A=B>0) a=x;else b=x;endendenddisp((a+b)/2,'root=');0=epsendfuctionfunction z=fl(x)z=x^3-x-1endfunction C语言:二分法#include#define f(x) (x*x*x-2*x*x+3*x-4)void main(){ float a=-10,b=10,c,eps=1e-5;while ((b-a)>eps){ c=(a+b)/2;if(f(c)==0) break;else if(f(a)*f(c) matlab三维显示图像,怎么我的matlab是二维的,>> [x,y]=meshgrid(-10:1:10); >> R=sqrt(x^2+y^2)+eps; >> 一段关于求黄金分割数的MATLAB代码,看不懂x = 3y = Inf;while abs(x-y) > eps(x)y = x;x = sqrt(1+x)end fortran 找错program eepreal::u1,u0,n,Ei(5),sum,x(5)integer::max=20parameter(eps=1e-10,y=0.577215665)write(*,100) '请输入x的值' !x=0.5000,0.5234,0.7635,1.2536,2.5000,2.7865,3.3500read*,x100 format(2x,f7.4)u0=-x;n=1;sum=u0do while(u1-u0>eps)u1 Fortran小问题,EXTERNAL FDIMENSION X(3),Y(3)DATA X /3*0.0/B = 2.0N=3M=10EPS=1.0E-5CALL DNMTC(X,N,B,M,EPS,F,Y)WRITE(*,*)DO 10 I=1,N10 WRITE(*,100) I,X(I)WRITE(*,*)100 FORMAT(5X,'X(',I2,1X,')=',E13.6)ENDFUNCTION F(X,N)DIMENSION X(N)F1=3*X(1)+X(2)+2*X 程序如下:x=linspace(0,4*pi,100);y1=sin(x);y2=cos(x);y3=sin(x)./(cos(x)+eps);y4=cos(x)./(sin(x)+eps);subplot(2,2,1); plot(x,y1),title('sin(x)');subplot(2,2,2); plot(x,y2),title('cos(x)');subplot(2,2,3); plot(x,y3),title('sin fortran问题,最好能运算EXTERNAL F DIMENSION X(4),Y(4) DATA X /4*0.0/ B = 2.0 N=4 M=10 EPS=1.0E-5 CALL DNMTC(X,N,B,M,EPS,F,Y) WRITE(*,*) DO 10 I=1,N10 WRITE(*,100) I,X(I) WRITE(*, MATLAB运行明明已经定义了参数 为啥总报错说未定义function [xv,fv]=GMGA(fitness,a,b,NP,NG,Pc,Pm,alpha,Pbm,eps)%大变异遗传算法L = ceil(log2((b-a)/eps+1));x = zeros(NP,L);for i=1:NP x(i,:) = Initial(L); fx(i) = fitness(Dec(a,b,x matlab中求定积分的运算I=int(cos(x)*cos(2*x),-pi/2,pi/2)I=quadl(@(t)(t-3*t.^2+2*t.^3).^(-1/3),eps,1/2)这两条式有何不同?int和quadl是什么回事?eps代表什么? VB编程求前N项和过程y=1+ x^2/(2!)+x^4/(4!)+.x^(2n)/((2n)!)补充代码 y=1+ x^2/(2!)+x^4/(4!)+.x^(2n)/((2n)!)public sub progession(sum#,,eps#)dim n%,t#n=2sum=1t=1do while (abs(t)>=eps)t=sum=sum+tn=loopend subprivate sub form_click()dim p1#call matlab绘制三维图 程序出错 x = 0:10:1000;y = -500:10:500;c=14831./(pi.*0.314278.*x.^0.876088.*0.057025.*x.^1.0935.*1.72+eps).*exp(-0.5.*(y./(0.314278.*x.^0.876088+eps)).^2).*exp(-0.5.*(80./( 0.057025.*x.^1.0935+eps)).^2);mesh(x,y,c); Error us matlab Attempted to access x(2); index out of bounds because numel(x)=1.在求解非线性方程时遇到问题自定义方程 function y = myfun(x) %定义函y=[3*x(1) - cos(x(2)* x(3))- 0.5;x(1)^2 - 81*(x(2) +0.1)^2 + sin(x(3) ) + 1.06;eps(-x (1) *