v1

test.cpp

@@ -0,0 +1,9 @@
+#include<iostream>
+#include<math.h>
+using namespace std;
+
+int main(){
+    int a = 9;
+    cout << floor(a/4) << endl;
+    return 0;
+}

zoom.cpp

@@ -24,7 +24,8 @@ int main(int argc, char ** argv)
 	pColorTableSize = 1024;
  
 	unsigned char *pBmpBuf;
-	int lineByte = (width*biCount / 8 + 3) / 4 * 4;
+	int lineByte = width*floor(biCount/8);
+	while(lineByte % 4 != 0){lineByte += 1;}
 	pBmpBuf = new unsigned char[lineByte*height];
 	fread(pBmpBuf, lineByte*height, 1, fp);
 	fclose(fp);
@@ -38,7 +39,8 @@ int main(int argc, char ** argv)
 	scanf("%f", &k);
 	int dstWidth = round(double(k*width));
 	int dstHeight = round(double(k*height));
-	int lineByte2 = (dstWidth*biCount / 8 + 3) / 4 * 4;
+	int lineByte2 = dstWidth*floor(biCount/8);
+	while(lineByte2 % 4 != 0){lineByte2 += 1;}
 	
 	unsigned char*pBmpBuf2;
 	pBmpBuf2 = new unsigned char[lineByte2*dstHeight];