# V1033\. Variable is declared as auto in C\. Its default type is int\.

The analyzer has detected a variable declared using the 'auto' keyword in C code\. Using this keyword could confuse developers accustomed to working with C\+\+11 or higher versions of C\+\+\. Instead of deducing the type, the compiler will interpret the 'auto' keyword as type 'int'\.

This may have unexpected results, for example, in arithmetic operations\. Consider the following simple example:

```cpp
float d = 3.14f;
int i = 1;
auto sum = d + i;
```

The value of the 'sum' variable will be '4', not the expected '4\.14'\. In C programs, the variable type must be declared explicitly:

```cpp
float d = 3.14f;
int i = 1;
float sum = d + i;
```

The original code fragment is absolutely correct from the viewpoint of the C\+\+ language\. This diagnostic will help you avoid errors in projects that make use of both languages\.