function?f=benchmark_func（xfunc_num）
global?initial_flag
persistent?fhd?f_bias

%?benchmark_func.m?is?the?main?function?for?25?test?functions?all?minimize
%?problems
%?e.g.?f=benchmark_func（xfunc_num）
%?x?is?the?variable?f?is?the?function?value?
%?func_num?is?the?function?num

%???????25?TEST?FUCNTIONS
%?	????Unimodal?Functions?（5）:
%?1.????Shifted?Sphere?Function?					????????????????Bounds[-100100]	f_bias=-450
%?2.	Shifted?Schwefel‘s?Problem?1.2				????????????	Bounds[-100100]	f_bias=-450
%?3.	Shifted?Rotated?High?Conditioned?Elliptic?Function			Bounds[-100100]	f_bias=-450
%?4.	Shifted?Schwefel‘s?Problem?1.2?with?Noise?in?Fitness?		Bounds[-100100]	f_bias=-450
%?5.	Schwefel‘s??Problem?2.6?with?Global?Optimum?on?Bounds		Bounds[-100100]	f_bias=-310
%?
%?	????Multimodal?Functions?（20）:
%?	????Basic?Functions?（7）:
%?6.	Shifted?Rosenbrock‘s??Function					????????????Bounds[-100100]	f_bias=390?
%?7.	Shifted?Rotated?Griewank‘s??Function?without?Bounds	????????Initilization?Range?[0?600]	f_bias=-180
%?8.	Shifted?Rotated?Ackley‘s??Function?with?Global?Optimum?on?Bounds	Bounds[-3232]	f_bias=-140
%?9.	Shifted?Rastrigin‘s??Function?					????????????Bounds[-55]	????f_bias=-330
%?10.	Shifted?Rotated?Rastrigin‘s??Function?				????????Bounds[-55]	????f_bias=-330
%?11.	Shifted?Rotated?Weierstrass?Function?				????????Bounds[-0.50.5]	f_bias=90
%?12.	Schwefel‘s??Problem?2.13					????????????????Bounds[-100100]	f_bias=-460?
%?	????Expanded?Functions?（2）:
%?13.	Expanded?Extended?Griewank‘s??plus?Rosenbrock‘s??Function?（F8F2）	Bounds[-31]	f_bias=-130
%?14.	Expanded?Rotated?Extended?Scaffe‘s??F6?				????????Bounds[-100100]	f_bias=-300
%?	????Hybrid?Composition?Functions?（11）:
%?15.	Hybrid?Composition?Function?1				????????????????Bounds[-55]	????f_bias=?120?
%?16.	Rotated?Hybrid?Composition?Function?1				????????Bounds[-55]	????f_bias=?120
%?17.	Rotated?Hybrid?Composition?Function?1?with?Noise?in?Fitness		Bounds[-55]	f_bias=?120
%?18.	Rotated?Hybrid?Composition?Function?2			????????	Bounds[-55]	????f_bias=10?
%?19.	Rotated?Hybrid?Composition?Function?2?with?a?Narrow?Basin?for?the?Global?Optimum	Bounds[-55]]	f_bias=10?
%?20.	Rotated?Hybrid?Composition?Function?2?with?the?Global?Optimum?on?the?Bounds		Bounds[-55]	f_bias=10
%?21.	Rotated?Hybrid?Composition?Function?3						Bounds[-55]????	f_bias=360?
%?22.	Rotated?Hybrid?Composition?Function?3?with?High?Condition?Number?Matrix		Bounds[-55]	f_bias=360
%?23.	Non-Continuous?Rotated?Hybrid?Composition?Function?3		Bounds[-55]????	f_bias=360?
%?24.	Rotated?Hybrid?Composition?Function?4				????????Bounds[-55]	????f_bias=260?
%?25.	Rotated?Hybrid?Composition?Function?4?without?Bounds	????Intilization?Range[-25]	f_bias=260?
%
%J.?J.?Liang?&?P.?N.?Suganthan???2005.Feb?18

if?initial_flag==0
????if?func_num==1?fhd=str2func（‘sphere_func‘）;?%[-100100]
????elseif?func_num==2?fhd=str2func（‘schwefel_102‘）;?%[-100100]
????elseif?func_num==3?fhd=str2func（‘high_c