fopen和QT（MinGW）错误

Question

I have the following code in my QT application:

FILE * file = fopen(m_fileName.c_str(), "rb");

, where the type of m_fileName is std::string . This code works fine in Visual Studio2012. But in QT 4.7.4 (MinGW compiler) my program crashes at this line.

I don't really know what is wrong with this code. I haven't used MinGW a lot, so there must be something I don't know about.

Update:

Code from main.cpp :

std::string fileName = "test1.bmp";
m_pTexture1 = new Texture(GL_TEXTURE_2D, fileName);
if (!m_pTexture1->Load()) {
   return;
}

Simplified code of Texture.cpp :

Texture::Texture(GLenum TextureTarget, std::string FileName)
{
    m_textureTarget = TextureTarget;
    m_fileName = FileName;
}

bool Texture::Load()
{
    try {
        FILE * file = fopen(m_fileName.c_str(),"rb");
    }
    catch (...) {
        std::cout « "Error loading texture '" « m_fileName;
        return false;
    }
}

Code of Texture.h :

class Texture
{
public:
    Texture(GLenum TextureTarget, std::string FileName);
    bool Load();

private:
    std::string m_fileName;
    GLenum m_textureTarget;
    GLuint m_textureObj;
    unsigned int width, height;
    unsigned char * data;
};

Yes, @PaulMcKenzie was right. I tried to print m_fileName in constructor and it crushed the program. Looks like m_fileName can't be initialized. But, I don't know why this happens.

Update 2

I figured out it crushes because of printf and other C i/o functions. Very strange.

Answer 1

Your code is syntax error. (bracket)

FILE * file = fopen(m_fileName.c_str()), "rb"); ^ this one

Did you compile successful?