Poor Style: Redundant Initialization

Abstract

雖指定變數值，但從不使用，而使它成為無用儲存。

Explanation

沒有使用變數的初始值。在指定初始值後，會為變數指定另一個值，或者超出範圍之外。

範例 1：以下摘錄的程式碼會為變數 r 指定值，然後在沒有使用的情況下將其覆寫。


  int r = getNum();
  r = getNewNum(buf);

References

[1] Standards Mapping - Common Weakness Enumeration CWE ID 398

[2] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3050 CAT II

[3] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3050 CAT II

[4] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3050 CAT II

[5] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3050 CAT II

[6] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3050 CAT II

[7] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3050 CAT II

[8] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3050 CAT II

desc.structural.cpp.poor_style_redundant_initialization

Abstract

雖指定變數值，但從不使用，而使它成為無用儲存。

Explanation


  int r = getNum();
  r = getNewNum(buf);