?? jiasudiedai.cpp
字號:
#include "iostream.h"
#include "math.h"
const double m=2.7184826;
double f(double x,double e);
double fr(double x,double e);
void main()
{
double x0,x1,e,q;
cout<<"請輸入x0值:";
cin>>x0;
cout<<"輸入誤差限e:";
cin>>e;
q=fr(x0,e);
//x1=f(x0)+q/(1-q)*(f(x0)-x0);
do
{
x0=x1;
cout<<"中間結果為"<<x1<<endl;
//q=fr(x0);
x1=f(x0,e)+q/(1-q)*(f(x0,e)-x0);
cout<<"中間結果為"<<x1<<endl;
}while(fabs(x1-x0)>=e);
cout<<"方程結果為:"<<x1;
cout<<endl;
}
double f(double x,double e)
{
return pow(e,-x);
}
double fr(double x,double e)
{
return -1*pow(e,-x);
//double y1;
//x=log(x)+89.62092;
//y1=1/3*exp(-2/3*log10(x));//y1=pow(x/3,-2/3);
//return y1;
}
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