add 3 to 6

pset10/3-insertsort.c

@@ -0,0 +1,43 @@
+#include <stdio.h>
+
+//插入排序（升序）
+//参数说明：数组，数组中已有元素个数
+void InsertSort(int a[], int n);
+
+int main() {
+  int n, i, num[1000];
+
+  scanf("%d", &n);
+  for (i = 0; i < n; i++)
+    scanf("%d", &num[i]);
+  InsertSort(num, n);
+  return 0;
+}
+
+/* 请在这里填写答案 */
+void InsertSort(int a[], int n) {
+  int loc;
+  int selected;
+  // sorted subarray: a[0 ~ i - 1]
+  for (int i = 1; i < n; i++) {
+    selected = a[i];
+		loc = 0;
+    for (int j = 0; j < i; j++) {
+      if (a[j] <= selected) {
+        loc = j + 1;
+      }
+    }
+    // switch to location
+    /* printf("location: %d i: %d\n", loc, i); */
+    for (int j = i; j > loc; j--) {
+      a[j] = a[j - 1];
+    }
+    a[loc] = selected;
+		// print array
+		for (int j = 0; j < n - 1; j++) {
+			printf("%d ", a[j]);
+		}
+		printf("%d\n", a[n - 1]);
+  }
+  return;
+}

pset10/4-shift.c

@@ -0,0 +1,36 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+void shift(int *array, int num, int size);
+
+int main() {
+  int i, n, p, array[100];
+
+  scanf(" %d%d", &n, &p); //测试用例保证0<p<n<=100
+  for (i = 0; i < n; i++)
+    scanf("%d", &array[i]); //测试用例保证所有输入可以用整型存储
+
+  shift(array, p, n); //向左移p位
+  for (i = 0; i < n - 1; i++)
+    printf("%d ", array[i]);
+  printf("%d\n", array[i]);
+
+  return 0;
+}
+
+/* 请在这里填写答案 */
+void shift(int *array, int num, int size) {
+  // Store data that will be overridden by shifting, starting from array[0]
+  int cache;
+
+  // Start shifting once a time.
+  for (int i = 0; i < num; i++) {
+    // Shift to the left.
+    cache = array[0];
+    for (int j = 0; j < size - 1; j++) {
+      array[j] = array[j + 1];
+    }
+    // Circular
+    array[size - 1] = cache;
+  }
+}

pset10/5-selectsort.c

@@ -0,0 +1,57 @@
+#include <stdio.h>
+
+//选择排序（升序）
+//参数说明：数组，数组中已有元素个数
+void selectSort(int data[], int elementCount);
+
+//函数功能：找数组中的最小值元素，并返回其下标
+//参数说明：数组名，查找起始位置下标，查找终止位置下标
+int findMin(int data[], int startLoc, int endLoc);
+
+//输出数组中所有元素
+//参数说明：数组，数组中已有元素个数
+void outputData(int data[], int elementCount);
+
+int main() {
+  int n, i, num[1010];
+
+  scanf("%d", &n);
+  for (i = 0; i < n; i++)
+    scanf("%d", &num[i]);
+  selectSort(num, n);
+  return 0;
+}
+
+/* 请在这里填写答案 */
+void selectSort(int data[], int elementCount) {
+  int tmp;
+  int min;
+  // Iterate n times
+  for (int i = 0; i < elementCount - 1; i++) {
+    // Swap data[i] and data[findMin()]
+    tmp = data[i];
+    min = findMin(data, i, elementCount - 1);
+    /* printf("i: %d, min: %d\n", i, min); */
+    data[i] = data[min];
+    data[min] = tmp;
+    outputData(data, elementCount);
+  }
+}
+
+int findMin(int data[], int startLoc, int endLoc) {
+  int min = data[startLoc], minloc = startLoc;
+  for (int i = startLoc; i <= endLoc; i++) {
+    if (data[i] <= min) {
+      minloc = i;
+      min = data[i];
+    }
+  }
+  return minloc;
+}
+
+void outputData(int data[], int elementCount) {
+  for (int i = 0; i < elementCount - 1; i++) {
+    printf("%d ", data[i]);
+  }
+  printf("%d\n", data[elementCount - 1]);
+}