# V7023\. Suspicious use of a variable in similar code fragments\. This may be a typo, and a different variable was intended\.

The analyzer has detected two structurally similar code blocks following one another that differ by a single variable\. In the first block, this variable appears multiple times, but in the second block it appears only once\. Perhaps, the author wrote such code using copy\-paste and forgot to change the variable\.

The example:

```cpp
if (x > 0) {
  Do1(x);
  Do2(x); 
}
if (y > 0) {
  Do1(y);
  Do2(x); // <=
}
```

In the first block, all actions involve the `x` variable\. In the second block, all actions involve the `y` variable, except for the `Do2(x)`method\. The author might have forgotten to change the variable, and the correct version should look like this: 

```cpp
if (x > 0) {
  Do1(x);
  Do2(x); 
}
if (y > 0) {
  Do1(y);
  Do2(y);
}
```

A good practice that protects against such an error is to extract the code into separate functions: 

```cpp
processVariable(x);
processVariable(y); 

function processVariable(value) {
  if (value > 0) {
    Do1(value);
    Do2(value);
  }
}
```