init commit

archive/algorithm/leetcode/48.c

@@ -0,0 +1,94 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <math.h>
+/**
+ * https://leetcode-cn.com/problems/rotate-image/description/
+ * 旋转图像
+ */
+
+//123
+//456
+//789
+
+//963
+//852
+//741
+
+//741
+//852
+//963
+
+//1,0
+//2,1
+
+//0,0 2,2
+//2,0 2,0
+//1,0 2,1
+//0,1 1,2
+
+void rotate(int matrix[3][3], int matrixRowSize, int *matrixColSizes)
+{
+    //先换对角
+    int count = matrixRowSize;
+    for (int i = 0; i < count; i++) //对角线交换元素
+    {
+        for (int n = 0; n < count - i; n++)
+        {
+            if (i == count - 1 - n &&n == count - 1 - i)
+            {
+                continue;
+            }
+            matrix[i][n] ^= matrix[count - 1 - n][count - 1 - i];
+            matrix[count - 1 - n][count - 1 - i] ^= matrix[i][n];
+            matrix[i][n] ^= matrix[count - 1 - n][count - 1 - i];
+        }
+    }
+    //以中间为轴换
+    for (int i = 0; i < count / 2; i++)
+    {
+        for (int n = 0; n < count; n++)
+        {
+            matrix[i][n] ^= matrix[count-1 - i][n];
+            matrix[count-1 - i][n] ^= matrix[i][n];
+            matrix[i][n] ^= matrix[count-1 - i][n];
+        }
+    }
+}
+/*
+void rotate(int** matrix, int matrixRowSize, int *matrixColSizes) {
+    int i = 0, j = 0, key;
+    int n =matrixRowSize;
+    for(i = 0; i < n / 2; i++){
+        for(j = i; j < n-1-i; j++){
+            key = matrix[i][j];
+            matrix[i][j] = matrix[n - 1 - j][i];
+            matrix[n - 1 - j][i] = matrix[n - 1 - i][n - 1 - j];
+            matrix[n - 1 - i][n - 1 - j] = matrix[j][n - 1 - i];
+            matrix[j][n - 1 - i] = key;
+        }
+    }
+
+}
+*/
+
+void print_r(int *a, int len)
+{
+    for (int i = 0; i < len; i++)
+    {
+        printf("%d\t", a[i]);
+    }
+    printf("\n");
+}
+
+int main()
+{
+    int a[3][3] = {{1, 2, 3},
+                   {4, 5, 6},
+                   {7, 8, 9}};
+    int *b = malloc(4);
+    rotate(a, 3, b);
+    printf("%d\n", 6 ^ 6);
+    getchar();
+    return 0;
+}