更新了文件名。开始了数据结构

Chapter04/switch.c

@@ -0,0 +1,64 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main()
+{
+    int ch;
+
+    ch = getchar();
+
+    switch (ch)
+    {
+    case 'a':
+    case 'A':
+        printf("Ant\n");
+        break;
+    case 'b':
+    case 'B':
+        printf("Butterfly\n");
+        break;
+    case 'c':
+    case 'C':
+        printf("Cobra\n");
+        break;
+    default:
+        printf("Input error");
+        // break;
+        // default可以不用
+    }
+
+#if 0
+    int score;
+
+    printf("Please enter:\n");
+    scanf("%d", &score);
+
+    if (score < 0 || score > 100)
+    {
+        fprintf(stderr, "EINVAL\n");
+        exit(1);
+    }
+
+    switch (score / 10)
+    {
+    case 10:
+    case 9:
+        puts("A");
+        break;
+    case 8:
+        puts("B");
+        break;
+    case 7:
+        puts("C");
+        break;
+    case 6:
+        puts("D");
+        break;
+    default:
+        puts("E");
+        break;
+    }
+#endif
+
+    exit(0);
+}