请问这段程序的错误是什么意思不明白?

#include"iostream.h"

void main()

{ int x,y,,z,big;

cout<<"input x,y and z please:"<<endl;

cin>>x>>y>>z;

big=x>y ? x:y> ? y:z;

cout<<"The max is:"<<big<<endl;

}

错误是什么意思?

--------------------Configuration: tt - Win32 Debug--------------------

Compiling...

f.cpp

C:\Program Files\Microsoft Visual Studio\MyProjects\tt\f.cpp(3) : error C2059: syntax error : ','

C:\Program Files\Microsoft Visual Studio\MyProjects\tt\f.cpp(5) : error C2065: 'z' : undeclared identifier

C:\Program Files\Microsoft Visual Studio\MyProjects\tt\f.cpp(6) : error C2065: 'big' : undeclared identifier

C:\Program Files\Microsoft Visual Studio\MyProjects\tt\f.cpp(6) : error C2059: syntax error : '?'

执行 cl.exe 时出错.

tt.exe - 1 error(s), 0 warning(s)

C:\Program Files\Microsoft Visual Studio\MyProjects\tt\f.cpp(3) : error C2059: syntax error : ','

C:\Program Files\Microsoft Visual Studio\MyProjects\tt\f.cpp(5) : error C2065: 'z' : undeclared identifier

C:\Program Files\Microsoft Visual Studio\MyProjects\tt\f.cpp(6) : error C2065: 'big' : undeclared identifier

主要是你{ int x,y,,z,big;这一行的Y后面多了一个逗号,syntax error 指语法错误;undeclared identifier 指无法识别的定义;

C:\Program Files\Microsoft Visual Studio\MyProjects\tt\f.cpp(6) : error C2059: syntax error : '?' 执行 cl.exe 时出错.

这一行指你因为上一个错误导致编译出错.