1修改

ex1.cpp

@@ -3,36 +3,18 @@
 #include <stdlib.h>
 #include <time.h>
 
-#define LENGTH 10000
+int LENGTH;
 //数组长度
+bool RANDOM = false;
+//是否随机生成数组
+int MODE = 0;
+//MODE_1: 迭代
+//MODE_2: 递归
 
 #define OUTPUT
 //是否输出
 
-// #define RANDOM
-//随机数
-
-
-#define MODE_1
-//MODE_1: 迭代
-//MODE_2: 递归
-
-
-int a[LENGTH];
-void init()
-{
-   #ifdef RANDOM
-      srand(time(NULL));
-   #endif
-
-   for(int i = 0 ; i < LENGTH ; i++)
-
-   #ifdef RANDOM
-       a[i]=1+rand()%LENGTH;
-   #else
-      a[i]=LENGTH-i;
-   #endif
-}
+int *a;
 
 void swap(int *a, int *b)
 {
@@ -41,7 +23,6 @@ void swap(int *a,int *b)
    *b = c;
 }
 
-#ifdef MODE_1
 void bobblesort1A(int a[], int n)
 {
    bool sorted = false;
@@ -56,16 +37,15 @@ void bobblesort1A(int a[],int n)
 
          sorted = false;
       }
-         
    }
    n--;
    if (sorted == false)
       goto A;
 }
 
-#elif defined MODE_2
-void bobblesort1A(int a[],int n)
+void bobblesort1B(int a[], int n)
 {
+
    bool sorted = false;
    sorted = true;
 
@@ -77,17 +57,49 @@ void bobblesort1A(int a[],int n)
 
          sorted = false;
       }
-         
    }
    n--;
    if (n == 1)
       return;
 
-   bobblesort1A(a,n);
+   bobblesort1B(a, n);
+}
+
+void (*bobblesort1C)(int a[], int n);
+
+void init()
+{
+   srand(time(NULL));
+   a = new int[LENGTH];
+
+   for (int i = 0; i < LENGTH; i++)
+      if (RANDOM == true)
+         a[i] = 1 + rand() % LENGTH;
+      else
+         a[i] = LENGTH - i;
+
+   if (MODE == 1)
+      bobblesort1C = bobblesort1A;
+   else if (MODE == 2)
+      bobblesort1C = bobblesort1B;
+}
+
+int main()
+{
+Begin:
+
+   printf("输入数组长度:");
+   scanf("%d", &LENGTH);
+
+   printf("选择模式:1.迭代 2.递归");
+   scanf("%d", &MODE);
+
+   if ((MODE <= 0) || (MODE >= 3))
+   {
+      printf("错误输入\n");
+      goto Begin;
    }
-#endif
 
-int main(){
    init();
    clock_t start_t, end_t;
    double total_t;
@@ -99,7 +111,7 @@ int main(){
 #endif
 
    start_t = clock();
-   bobblesort1A(a,LENGTH);
+   bobblesort1C(a, LENGTH);
    end_t = clock();
 
 #ifdef OUTPUT
@@ -111,4 +123,5 @@ int main(){
    printf("运算时间: %.4f 秒\n", ((double)(end_t - start_t) / CLOCKS_PER_SEC));
    system("pause");
 
+   goto Begin;
 }