C语言 进退法确定极小值区间
标签：语言 指针 cti turn pre while fun define c语言
#include
#define F(x) (3*x*x-8*x+9)
double fun1(double x);
void goAndBackSectionPrint(double x1, double h, double (*f)(double));
int main(void){
goAndBackSectionPrint(0, 0.1, fun1);
return 0;
}
//进退法打印区间
//x1 搜索初值
//h 搜索步长
//f 待搜索函数f(x)的指针
void goAndBackSectionPrint(double x1, double h, double (*f)(double)){
double a1 = x1;
double y1 = (*f)(a1);
double a2 = a1 + h;
double y2 = f(a2);
double a3 = 0;
double y3 = 0;
if(y2 > y1){
h = -h;
a3 = a1;
y3 = y1;
a1 = a2;
y1 = y2;
a2 = a3;
y2 = y3;
}
a3 = a2 + h;
y3 = f(a3);
while(y3
C语言 进退法确定极小值区间
标签：语言 指针 cti turn pre while fun define c语言
原文地址：https://www.cnblogs.com/ritchie0307/p/12964045.html
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