微调

Co-authored-by: Copilot <copilot@github.com>

lab-3/lab3-3.cpp

@@ -24,18 +24,20 @@ int main()
         return 0;
     }
 
+    // sobel模板
     int tw = 3;
     int th = 3;
+    // xy方向的sobel模板
     int sobel_x[9]={-1,0,1,-2,0,2,-1,0,1};
     int sobel_y[9]={-1,-2,-1,0,0,0,1,2,1};
 
-    int i,j,k,l;
-    unsigned char *result_grey;
-    result_grey = new unsigned char[H * W];
+    int i,j,k,l;    // 中间变量
+    unsigned char *result;
+    result = new unsigned char[H * W];
 
     for (i = 0; i < H * W; i++)
     {
-        result_grey[i] = 255;
+        result[i] = 255;
     }
     for (i = th / 2; i < H - th / 2; i++)
     {
@@ -56,20 +58,22 @@ int main()
             int sum = (int)sqrt(gx * gx + gy * gy);
             if (sum > 100)
             {
-                result_grey[i * W + j] = 0;
+                result[i * W + j] = 0;
             }
             else
             {
-                result_grey[i * W + j] = 255;
+                result[i * W + j] = 255;
             }
         }
     }
-    FILE *fnew;
-    fopen_s(&fnew, "./数据/sobel.raw", "wb");
-    if (fnew)
+
+    // 将结果写入文件
+    FILE *fresult;
+    fopen_s(&fresult, "./数据/sobel.raw", "wb");
+    if (fresult)
     {
-        fwrite(result_grey, sizeof(unsigned char), H * W, fnew);
-        fclose(fnew);
+        fwrite(result, sizeof(unsigned char), H * W, fresult);
+        fclose(fresult);
     }
     else
     {