diff --git a/CMakeLists.txt b/CMakeLists.txt
index fe099ef..ec7eb9e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -40,6 +40,8 @@ endif()
 
 ##############################################################################
 
+add_definitions(-D__STDC__=1 -D_USE_MATH_DEFINES)
+
 subdirs(mojiben1 mojiben2 mojiben3 mojiben4)
 
 ##############################################################################
diff --git a/mojiben2/mojiben2.cpp b/mojiben2/mojiben2.cpp
index 9daa294..9fa278e 100644
--- a/mojiben2/mojiben2.cpp
+++ b/mojiben2/mojiben2.cpp
@@ -365,14 +365,14 @@ unsigned __stdcall ThreadProc( void * )
             sint = sin(v[i].angle0 * M_PI / 180);
             for(k = -200; k < 200; k += 30)
             {
-                apt[0].x = 150 + k * cost + 150 * sint;
-                apt[0].y = 150 + k * sint - 150 * cost;
-                apt[1].x = 150 + k * cost - 150 * sint;
-                apt[1].y = 150 + k * sint + 150 * cost;
-                apt[2].x = 150 + (k + 30) * cost - 150 * sint;
-                apt[2].y = 150 + (k + 30) * sint + 150 * cost;
-                apt[3].x = 150 + (k + 30) * cost + 150 * sint;
-                apt[3].y = 150 + (k + 30) * sint - 150 * cost;
+                apt[0].x = LONG(150 + k * cost + 150 * sint);
+                apt[0].y = LONG(150 + k * sint - 150 * cost);
+                apt[1].x = LONG(150 + k * cost - 150 * sint);
+                apt[1].y = LONG(150 + k * sint + 150 * cost);
+                apt[2].x = LONG(150 + (k + 30) * cost - 150 * sint);
+                apt[2].y = LONG(150 + (k + 30) * sint + 150 * cost);
+                apt[3].x = LONG(150 + (k + 30) * cost + 150 * sint);
+                apt[3].y = LONG(150 + (k + 30) * sint - 150 * cost);
                 BeginPath(hdcMem);
                 Polygon(hdcMem, apt, 4);
                 EndPath(hdcMem);
@@ -400,14 +400,14 @@ unsigned __stdcall ThreadProc( void * )
 
                 FillRgn(hdcMem, hRgn, (HBRUSH)GetStockObject(BLACK_BRUSH));
 
-                apt[0].x = 150 + k * cost + 150 * sint;
-                apt[0].y = 150 + k * sint - 150 * cost;
-                apt[1].x = 150 + k * cost - 150 * sint;
-                apt[1].y = 150 + k * sint + 150 * cost;
-                apt[2].x = 150 + (k + 30) * cost - 150 * sint;
-                apt[2].y = 150 + (k + 30) * sint + 150 * cost;
-                apt[3].x = 150 + (k + 30) * cost + 150 * sint;
-                apt[3].y = 150 + (k + 30) * sint - 150 * cost;
+                apt[0].x = LONG(150 + k * cost + 150 * sint);
+                apt[0].y = LONG(150 + k * sint - 150 * cost);
+                apt[1].x = LONG(150 + k * cost - 150 * sint);
+                apt[1].y = LONG(150 + k * sint + 150 * cost);
+                apt[2].x = LONG(150 + (k + 30) * cost - 150 * sint);
+                apt[2].y = LONG(150 + (k + 30) * sint + 150 * cost);
+                apt[3].x = LONG(150 + (k + 30) * cost + 150 * sint);
+                apt[3].y = LONG(150 + (k + 30) * sint - 150 * cost);
                 BeginPath(hdcMem);
                 Polygon(hdcMem, apt, 4);
                 EndPath(hdcMem);
@@ -474,10 +474,10 @@ unsigned __stdcall ThreadProc( void * )
 
                     FillRgn(hdcMem, hRgn, (HBRUSH)GetStockObject(BLACK_BRUSH));
 
-                    apt[0].x = v[i].cx + 200 * cost;
-                    apt[0].y = v[i].cy + 200 * sint;
-                    apt[1].x = v[i].cx + 200 * cost2;
-                    apt[1].y = v[i].cy + 200 * sint2;
+                    apt[0].x = LONG(v[i].cx + 200 * cost);
+                    apt[0].y = LONG(v[i].cy + 200 * sint);
+                    apt[1].x = LONG(v[i].cx + 200 * cost2);
+                    apt[1].y = LONG(v[i].cy + 200 * sint2);
                     apt[2].x = v[i].cx;
                     apt[2].y = v[i].cy;
                     BeginPath(hdcMem);
@@ -520,10 +520,10 @@ unsigned __stdcall ThreadProc( void * )
 
                     FillRgn(hdcMem, hRgn, (HBRUSH)GetStockObject(BLACK_BRUSH));
 
-                    apt[0].x = v[i].cx + 200 * cost;
-                    apt[0].y = v[i].cy + 200 * sint;
-                    apt[1].x = v[i].cx + 200 * cost2;
-                    apt[1].y = v[i].cy + 200 * sint2;
+                    apt[0].x = LONG(v[i].cx + 200 * cost);
+                    apt[0].y = LONG(v[i].cy + 200 * sint);
+                    apt[1].x = LONG(v[i].cx + 200 * cost2);
+                    apt[1].y = LONG(v[i].cy + 200 * sint2);
                     apt[2].x = v[i].cx;
                     apt[2].y = v[i].cy;
                     BeginPath(hdcMem);
@@ -752,9 +752,6 @@ void Kakijun_OnPaint(HWND hwnd)
 LRESULT CALLBACK
 KakijunWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
-    HDC hdc;
-    PAINTSTRUCT ps;
-
     switch(uMsg)
     {
         HANDLE_MSG(hwnd, WM_ERASEBKGND, Kakijun_OnEraseBkgnd);
diff --git a/mojiben3/mojiben3.cpp b/mojiben3/mojiben3.cpp
index 80a570d..e6b85e1 100644
--- a/mojiben3/mojiben3.cpp
+++ b/mojiben3/mojiben3.cpp
@@ -654,9 +654,6 @@ void Kakijun_OnDestroy(HWND hwnd)
 LRESULT CALLBACK
 KakijunWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
-    HDC hdc;
-    PAINTSTRUCT ps;
-
     switch (uMsg)
     {
         HANDLE_MSG(hwnd, WM_CREATE, Kakijun_OnCreate);
diff --git a/mojiben4/mojiben4.cpp b/mojiben4/mojiben4.cpp
index c7c8a55..e480381 100644
--- a/mojiben4/mojiben4.cpp
+++ b/mojiben4/mojiben4.cpp
@@ -709,9 +709,6 @@ void Kakijun_OnDestroy(HWND hwnd)
 LRESULT CALLBACK
 KakijunWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
-    HDC hdc;
-    PAINTSTRUCT ps;
-
     switch (uMsg)
     {
         HANDLE_MSG(hwnd, WM_CREATE, Kakijun_OnCreate);