diff --git a/initVulkan.c b/initVulkan.c
index 927e990..d2b54fa 100644
--- a/initVulkan.c
+++ b/initVulkan.c
@@ -336,7 +336,7 @@ void createComputeDescriptorSets(Compute *compute)
 
 void createShaderModule(VkDevice device, char *filename, VkShaderModule *shaderModule)
 {
-    long shaderSourceSize;
+    size_t shaderSourceSize;
     char *shaderSource = readFile(filename, "rb", &shaderSourceSize);
 
     VkShaderModuleCreateInfo shaderModuleInfo;
diff --git a/initVulkan.h b/initVulkan.h
index 5acff37..36a8b99 100644
--- a/initVulkan.h
+++ b/initVulkan.h
@@ -20,7 +20,7 @@
 #define WORKGROUP_SIZE_Z 1
 
 #define SUCCESS 0
-#define FAILURE -1
+#define FAILURE (-1)
 #define ASSERT_VK(f) { \
     VkResult res = (f); \
     if (res != VK_SUCCESS) { \
@@ -28,7 +28,7 @@
         assert(res == VK_SUCCESS); \
     } \
 }
-#define ASSERT_GLFW_SUCCESS(res) { if (res != GLFW_TRUE) { printf("Error-Code: %d", res); return FAILURE; } }
+#define ASSERT_GLFW_SUCCESS(res) { if ((res) != GLFW_TRUE) { printf("Error-Code: %d", res); return FAILURE; } }
 
 typedef struct dt {
     float dt;
diff --git a/openglMain.c b/openglMain.c
index 16f8fdb..5ea7a9d 100644
--- a/openglMain.c
+++ b/openglMain.c
@@ -70,10 +70,10 @@ int main()
     glBindBuffer(GL_ARRAY_BUFFER, particleBuffer);
     // position
     glEnableVertexAttribArray(0);
-    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeOfParticle, (GLvoid *)0);
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, (GLsizei) sizeOfParticle, (GLvoid *)0);
     // color
     glEnableVertexAttribArray(1);
-    glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeOfParticle, (GLvoid *)24);
+    glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, (GLsizei) sizeOfParticle, (GLvoid *)24);
     glBindVertexArray(0);
 
     /************* RENDER LOOP *************/
@@ -94,7 +94,7 @@ int main()
 
         /*** UPDATE ***/
         glUseProgram(computeShaderProgram);
-        glUniform1f(dtUniformLocation, tFrame);
+        glUniform1f(dtUniformLocation, (GLfloat) tFrame);
         glDispatchCompute(PARTICLE_AMOUNT / WORKGROUP_SIZE_X, 1, 1);
         glMemoryBarrier(GL_SHADER_STORAGE_BARRIER_BIT | GL_VERTEX_ATTRIB_ARRAY_BARRIER_BIT);
 
diff --git a/particlesystem.c b/particlesystem.c
index a7ae7fb..4767749 100644
--- a/particlesystem.c
+++ b/particlesystem.c
@@ -1,6 +1,5 @@
 #include <malloc.h>
 #include <stdlib.h>
-#include <stdio.h>
 
 #include "particlesystem.h"
 
@@ -74,9 +73,9 @@ void resetParticle(emitter *e, particle *p)
     p->position->y = e->position->y;
     p->position->z = e->position->z;
 
-    p->velocity->x = ((float) (rand() % 2 ? -1 : 1) * rand()) / RAND_MAX;
-    p->velocity->y = ((float) (rand() % 2 ? -1 : 1) * rand()) / RAND_MAX;
-    p->velocity->z = ((float) (rand() % 2 ? -1 : 1) * rand()) / RAND_MAX;
+    p->velocity->x = ((float) ((rand() % 2 ? -1 : 1) * rand())) / RAND_MAX;
+    p->velocity->y = ((float) ((rand() % 2 ? -1 : 1) * rand())) / RAND_MAX;
+    p->velocity->z = ((float) ((rand() % 2 ? -1 : 1) * rand())) / RAND_MAX;
 
     p->age = rand() / 10;
 }
@@ -86,7 +85,7 @@ void resetParticle(emitter *e, particle *p)
  */
 int drawParticles(particle_system *particleSystem)
 {
-
+    return 0;
 }
 
 /*
diff --git a/utils.c b/utils.c
index ec90d17..ae779f1 100644
--- a/utils.c
+++ b/utils.c
@@ -4,11 +4,11 @@
 #include <string.h>
 #include "utils.h"
 
-char *readFile(char *filename, char *mode, long *size)
+char *readFile(char *filename, char *mode, size_t *size)
 {
     FILE *file;
     char *buffer;
-    long bytes;
+    size_t bytes;
 
     if((file = fopen(filename, mode)) == NULL)
     {
@@ -16,7 +16,7 @@ char *readFile(char *filename, char *mode, long *size)
     }
 
     fseek(file, 0L, SEEK_END);
-    bytes = ftell(file);
+    bytes = (size_t) ftell(file);
     fseek(file, 0L, SEEK_SET);
 
     if((buffer = calloc(bytes, sizeof(char))) == NULL)
diff --git a/utils.h b/utils.h
index 046f3ec..8048ec2 100644
--- a/utils.h
+++ b/utils.h
@@ -6,4 +6,4 @@
 
 #define WORKGROUP_SIZE_X 1024
 
-char *readFile(char *filename, char *mode, long *size);
\ No newline at end of file
+char *readFile(char *filename, char *mode, size_t *size);
\ No newline at end of file
diff --git a/vulkanMain.c b/vulkanMain.c
index 39d78b3..2d7de92 100644
--- a/vulkanMain.c
+++ b/vulkanMain.c
@@ -23,7 +23,7 @@ int main()
     freeParticleSystem(ps);
 
     /************* INIT GLFW *************/
-    ASSERT_GLFW_SUCCESS(glfwInit());
+    ASSERT_GLFW_SUCCESS(glfwInit())
     glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
     glfwWindowHint(GLFW_RESIZABLE, GLFW_FALSE);
     GLFWwindow *window = glfwCreateWindow(WIDTH, HEIGHT, "Informatikprojekt - Vulkan", NULL, NULL);
@@ -54,8 +54,8 @@ int main()
     submitInfo.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
     submitInfo.signalSemaphoreCount = 1;
     submitInfo.pSignalSemaphores = &compute.semaphore;
-    ASSERT_VK(vkQueueSubmit(compute.queue, 1, &submitInfo, VK_NULL_HANDLE));
-    ASSERT_VK(vkQueueWaitIdle(compute.queue));
+    ASSERT_VK(vkQueueSubmit(compute.queue, 1, &submitInfo, VK_NULL_HANDLE))
+    ASSERT_VK(vkQueueWaitIdle(compute.queue))
 
     createComputeCommandBuffer(&compute);