Update data_and_memory.md

docs/chapter_data_structure/data_and_memory.md

@@ -58,10 +58,10 @@ comments: true
 
     ```cpp title=""
     /* 使用多种「基本数据类型」来初始化「数组」 */
-    int numbers[5] = {0};
+    int numbers[5];
-    float decimals[5] = {0};
+    float decimals[5];
-    char characters[5] = {'0','0','0','0','0'};
+    char characters[5];
-    bool booleans[5] = {0};
+    bool booleans[5];
     ```
 
 === "Python"