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Another code that works fine in Codeblocks, but can not show any textures. No errors.

#include <GL/glew.h>
#include <GLFW/glfw3.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <iostream>
#include <SOIL.h>
GLuint texture;

static void error_callback(int error, const char* description)
{
    fputs(description, stderr);
}
static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
{
    if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
        glfwSetWindowShouldClose(window, GL_TRUE);
}

GLuint LoadTexture(std::string filename)
{
   glGenTextures(1, &texture);
   glBindTexture(GL_TEXTURE_2D, texture);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

   int w=0, h=0;
   unsigned char *textura; // buffer for data file texture, JPEG is only RGB, not RGBA
   textura = SOIL_load_image(filename.c_str(), &w, &h, 0, SOIL_LOAD_RGB);
   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, w, h,  0, GL_RGB, GL_UNSIGNED_BYTE, textura);
   printf("Texture parametres: w= %d, h= %d\n", w, h);

   SOIL_free_image_data(textura);
   glBindTexture(GL_TEXTURE_2D, 0);
   return texture;
}

int main(void)
{
    glewInit();
    glewExperimental = GL_TRUE;
    LoadTexture("cs.jpg"); // is a JPEG image 128x128 in same directory as project.

    GLFWwindow* window;
    glfwSetErrorCallback(error_callback);
    if (!glfwInit())
        exit(EXIT_FAILURE);
    window = glfwCreateWindow(640, 480, "Simple example", NULL, NULL);
    if (!window)
    {
        glfwTerminate();
        exit(EXIT_FAILURE);
    }
    glfwMakeContextCurrent(window);
    glfwSwapInterval(1);
    glfwSetKeyCallback(window, key_callback);
    while (!glfwWindowShouldClose(window))
    {
        float ratio;
        int width, height;
        glfwGetFramebufferSize(window, &width, &height);
        ratio = width / (float) height;
        glViewport(0, 0, width, height);
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
        glOrtho(-ratio, ratio, -1.f, 1.f, 1.f, -1.f);
        glMatrixMode(GL_MODELVIEW);
        glLoadIdentity();
        glRotatef((float) glfwGetTime() * 50.f, 0.f, 0.f, 1.f);

        glEnable(GL_TEXTURE_2D);
        glBegin(GL_TRIANGLES);
          glTexCoord2f(0.0f, 0.0f);
          glColor3f(1.f, 0.f, 0.f);
          glVertex3f(-0.6f, -0.4f, 0.f);

          glTexCoord2f(1.0f, 0.0f);
          glColor3f(0.f, 1.f, 0.f);
          glVertex3f(0.6f, -0.4f, 0.f);

          glTexCoord2f(1.0, 1.0f);
          glColor3f(0.f, 0.f, 1.f);
          glVertex3f(0.f, 0.6f, 0.f);
        glEnd();

        glfwSwapBuffers(window);
        glfwPollEvents();
    }

    glfwDestroyWindow(window);
    glfwTerminate();
    exit(EXIT_SUCCESS);
}