脚本函数创建

以创建一个解方程根的函数为例

x1 x2 为输出结果   a b c 为输入的参数

function [x1 x2]=equation_solve(a,b,c)
delt =b*b -4*a*c
if delt <0
    ‘there is no answer!’
elseif delt==0
    ‘there is only one answer’
    x1=(-a+sqrt(delt))/2;
    ans=x1;
else
    ‘there has two answers’
     x1=(-a+sqrt(delt))/2;
     x2=(-a-sqrt(delt))/2;
     ans=[x1 x2]
end