Input argument "x" is undefined.Error in ==> chilun at 2f=(x(1)*x(3)*(1+x(5))+ x(2)*x(4)*(1+31.5/x(5)))/(2*cos(x(6)));急我狂给金币啊.我的总程序在这里

Input argument "x" is undefined.Error in ==> chilun at 2f=(x(1)*x(3)*(1+x(5))+ x(2)*x(4)*(1+31.5/x(5)))/(2*cos(x(6)));急我狂给金币啊.我的总程序在这里
Input argument "x" is undefined.
Error in ==> chilun at 2
f=(x(1)*x(3)*(1+x(5))+ x(2)*x(4)*(1+31.5/x(5)))/(2*cos(x(6)));
急
我狂给金币啊.
我的总程序在这里

Input argument "x" is undefined.Error in ==> chilun at 2f=(x(1)*x(3)*(1+x(5))+ x(2)*x(4)*(1+31.5/x(5)))/(2*cos(x(6)));急我狂给金币啊.我的总程序在这里
这里的X应该是一个函数,Input argument "x" is undefined.就是X没有被定义的意思,在程序的开始处定义一个X（）函数,int X（int a){块语句},在块语句中可以写自己需要实现的算法,