diff --git a/apps/CMakeLists.txt b/apps/CMakeLists.txt
index e277ec2..88ab4fe 100644
--- a/apps/CMakeLists.txt
+++ b/apps/CMakeLists.txt
@@ -1,3 +1,3 @@
 add_executable(app main.cpp)
 
-target_link_libraries(app PRIVATE block vector)
+target_link_libraries(app PRIVATE block)
diff --git a/apps/main.cpp b/apps/main.cpp
index 90111fa..8882efd 100644
--- a/apps/main.cpp
+++ b/apps/main.cpp
@@ -4,5 +4,23 @@
 int main(int argc, char **argv) {
     std::cout << "Hello, world!" << std::endl;
     Volumes::Block block;
+    Vector::Vector3 vec(1,2,3);
+    Vector::Vector3 vec2(2,1,3);
+    std::cout<<vec<<std::endl;
+    std::cout<<vec.len()<<std::endl;
+    vec*=2;
+    std::cout<<vec<<std::endl;
+    std::cout<<vec.len()<<std::endl;
+    vec/=2;
+    std::cout<<vec<<std::endl;
+    std::cout<<vec.len()<<std::endl;
+    std::cout<<vec.dot(vec)<<std::endl;
+    std::cout<<vec.cross(vec2)<<std::endl;
+    vec.norm();
+    std::cout<<vec<<std::endl;
+    std::cout<<vec.len()<<std::endl;
+    vec-=vec;
+    std::cout<<vec<<std::endl;
+    std::cout<<vec.len()<<std::endl;
     return 0;
 }
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 869c69e..e8a8f86 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -3,8 +3,6 @@ file(GLOB HEADER_LIST CONFIGURE_DEPENDS "${PROJECT_SOURCE_DIR}/include/Block/*")
 add_library(block block.cpp vector3.cpp ${HEADER_LIST})
 add_library(block::block ALIAS block)
 
-target_link_libraries(block PUBLIC vector::vector)
-
 target_include_directories(block PUBLIC "${PROJECT_SOURCE_DIR}/include")
 
 source_group(