Simple openGL GLSL vertex+fragment shader

shaders.cpp

void checkCompileErrors(unsigned int object, std::string type) {
        int success;
        char infoLog[1024];
        if (type != "PROGRAM") {
            glGetShaderiv(object, GL_COMPILE_STATUS, &success);
            if (!success) {
                glGetShaderInfoLog(object, 1024, NULL, infoLog);
                std::cout << "| ERROR::SHADER: Compile-time error: Type: " << type << "\n"
                          << infoLog << "\n -- --------------------------------------------------- -- "
                          << std::endl;
            }
        } else {
            glGetProgramiv(object, GL_LINK_STATUS, &success);
            if (!success) {
                glGetProgramInfoLog(object, 1024, NULL, infoLog);
                std::cout << "| ERROR::Shader: Link-time error: Type: " << type << "\n"
                          << infoLog << "\n -- --------------------------------------------------- -- "
                          << std::endl;
            }
        }
    }


//vertex shader
const char* vertexSource = "#version 330 core\n"
                           "layout (location = 0) in vec3 vertex;\n"
                           "void main() {\n"
                           "    gl_Position = vec4(vertex, 1.0);\n"
                           "}\n";
unsigned int sVertex = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(sVertex, 1, &vertexSource, NULL);
glCompileShader(sVertex);
checkCompileErrors(sVertex, "VERTEX");

// fragment Shader
const char* fragmentSource = "#version 330 core\n"
                             "out vec4 colorOut;\n"
                             "void main() {\n"
                             "    colorOut = vec4(1.0, 1.0, 0.0, 1.0);\n"
                             "}\n";
unsigned int sFragment = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(sFragment, 1, &fragmentSource, NULL);
glCompileShader(sFragment);
checkCompileErrors(sFragment, "FRAGMENT");

unsigned int program = glCreateProgram();
glAttachShader(program, sVertex);
glAttachShader(program, sFragment);
glLinkProgram(program);

glDeleteShader(sVertex);
glDeleteShader(sFragment);

glUseProgram(program);