'的std :: basic_string的<炭的std :: char_traits <char>，性病::分配器<char>> :: c_str'：非標準語法;使用「＆」來創建一個指針成員

Question

我試圖使可以讀取和編譯OpenGL的頂點和片段着色器文件的功能，但我得到這個錯誤：

'std::basic_string<char,std::char_traits<char>,std::allocator<char>>::c_str': non-standard syntax; use '&' to create a pointer to member 

我不太清楚如何解決它。這裏是我的代碼：

GLuint shader_load(const GLchar* vertex, const GLchar* fragment) { 

std::string ver = file_read_all(vertex); 
std::string frag = file_read_all(fragment); 

const GLchar* verCode = ver.c_str; 
const GLchar* fragCode = frag.c_str; 

GLuint program; 

GLuint verShader, fragShader; 
GLint success; 
GLchar log[512]; 

verShader = glCreateShader(GL_VERTEX_SHADER); 
glShaderSource(verShader, 1, &verCode, NULL); 
glCompileShader(verShader); 
glGetShaderiv(verShader, GL_COMPILE_STATUS, &success); 

if (!success) { 
    glGetShaderInfoLog(verShader, 512, NULL, log); 
    std::cout << "Failed to compile Vertex Shader\n" << log << std::endl; 
    return NULL; 
} 

fragShader = glCreateShader(GL_FRAGMENT_SHADER); 
glShaderSource(fragShader, 1, &fragCode, NULL); 
glCompileShader(fragShader); 
glGetShaderiv(fragShader, GL_COMPILE_STATUS, &success); 

if (!success) { 
    glGetShaderInfoLog(fragShader, 512, NULL, log); 
    std::cout << "Failed to compile Fragment Shader\n" << log << std::endl; 
    return NULL; 
} 

program = glCreateProgram(); 

glAttachShader(program, verShader); 
glAttachShader(program, fragShader); 

glLinkProgram(program); 

glGetProgramiv(program, GL_LINK_STATUS, &success); 
if (!success) 
{ 
    glGetProgramInfoLog(program, 512, NULL, log); 
    std::cout << "Failed to Link Shader\n" << log << std::endl; 
} 

glDeleteShader(verShader); 
glDeleteShader(fragShader); 
} 

我使用Visual Studio 2015年社區在Windows 10

Answer 1

std::string::c_str是一個成員函數，如果你要稱呼它，你應該添加()。

const GLchar* verCode = ver.c_str(); 
           ~~