外推法_外推法C语言_外推法程序c_外推法_怎么外推c_

#include<stdio.h> #include<math.h> #define R 0.001 double f(double x) { double t; t=x*x-10*x+36; return t; } int main() { double h0=R,y1,y2,y3,x1,x2,x3,h; x1=0;h=h0;x2=h; y1=f(x1);y2=f(x2); if(y2>y1) {h=-h; x3=x1; y3=y1; x1=x2; y1=y2; x2=x3; y2=y3; } x3=x2+h;y3=f(x3); while(y3<y2) {h=2*h; x1=x2; y1=y2; x2=x3; y2=y3; x3=x2+h; y3=f(x3); } printf("f(%f)=%f,f(%f)=%f,f(%f)=%f\n",x1,y1,x2,y2,x3,y3); }