add

public/c/ch2/richeng/bisan.c

@@ -0,0 +1,60 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+void table(int k, int **a, int n);
+void printTable(int **array, int n);
+
+void table(int k, int **a, int n) {
+    // 设置日程表第一行
+    for (int i = 0; i < n; i++) {
+        a[i][0] = i + 1;  // 第一列设置为选手序号
+    }
+    // 填充表格
+    for (int s = 0; s < k; s++) {
+        int half = 1 << s; // 2^s
+        for (int t = 0; t < (1 << (k - s - 1)); t++) { // 2^(k-s-1)
+            for (int i = 0; i < half; i++) {
+                for (int j = 0; j < half; j++) {
+                    a[i + half * t][j + half * t] = a[i][j];
+                    a[i + half * t][j + half * t + half] = a[i][j + half];
+                    a[i + half * t + half][j + half * t] = a[i + half][j];
+                    a[i + half * t + half][j + half * t + half] = a[i + half][j + half];
+                }
+            }
+        }
+    }
+}
+
+void printTable(int **array, int n) {
+    // 打印表头
+    printf("选手 | ");
+    for (int j = 1; j < n; j++) {      printf("第%d天 | ", j);    }  
+    printf("\n");
+    // 打印分隔行
+    for (int j = 0; j <= n; j++) {     printf("-----");    }
+    printf("\n");
+    for (int i = 0; i < n; i++) {
+        printf("%2d   | ", array[i][0]);  // 打印选手序号
+        for (int j = 1; j < n; j++) {  printf("%2d    | ", array[i][j]);  }
+        printf("\n");
+    }
+}
+
+int main() {
+    int k = 3;  // 2^3 = 8个运动员
+    int n = 1 << k;  // 计算2^k
+    // 创建二维数组作为日程表
+    int **array = (int **)malloc(n * sizeof(int *));
+    for (int i = 0; i < n; i++) {
+        array[i] = (int *)malloc(n * sizeof(int));
+        for (int j = 0; j < n; j++) {  // 确保初始化
+            array[i][j] = 0;
+        }
+    }    
+    table(k, array, n);// 制作日程表    
+    printTable(array, n);// 输出日程表
+    // 释放动态分配的内存
+    for (int i = 0; i < n; i++) { free(array[i]); }
+    free(array);
+    return 0;
+}