sstream、fstream部分应用

“sstream”
string stream

1.std::stringstream  vShaderStream
  vShaderStream<<
  vShaderStream>>
  vShaderStream.str()

“fstream”
file stream

2.std::ifstream vShaderFile
  vShaderFile.opean()
  vShaderFile.rdbuf()

2.1
  std::ifstream::badbit
  std::ifstream::failure

“string”

3.std::string vertexCode
  vertexCode.c_str()    

try
{}
catch()
{}