求高手用 MATLAB 编写一个程序，求以x，y为自变量的函数f(x,y)的值，f(x,y)定义如下

Question

f(x,y)=x+y(x>=0&y>=0)
f(x,y)=x+y*y(x>=0&y<0)
f(x,y)=x*x+y(x<0,y>=0)
f(x,y)=x*x+y*y(x<0&y<0)
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Answer 1

(x,y)=x+y(x>=0&y>=0)
f(x,y)=x+y*y(x>=0&y<0)
f(x,y)=x*x+y(x<0,y>=0)
f(x,y)=x*x+y*y(x<0&y<0)本回答被提问者采纳