QOpenGLShader compiling failed

I am going to render a simple triangle in the scene. When using the build-in GLSL and modifing the original fixed contents to my own, the qt reports a bug as follows. I am sure that i am right because the code works before. However, after i add new texts it becomes bad.

I write the same code and using addShaderFromSourceCode, it works. So how to deal with this problem?

QOpenGLShader::compile(Vertex): 0(2) : error C0204: version directive must be first statement and may not be repeated

• • • Problematic Vertex shader source code ***

#define lowp

#define mediump

#define highp

#line 1

???#version 330 core

layout(location=0)in vec3 aPos;

......

***

add vertex shader failed! "0(2) : error C0204: version directive must be first statement and may not be repeated\n"