How to do type conversion in c language

Type conversion in C language can convert the value of one data type to another. Implicit conversion is automatically performed by the compiler, and explicit conversion is manually specified by the programmer through the cast operator. Implicit conversions automatically convert low-precision values ​​to high-precision values, while explicit conversions require considerations such as data loss, reduced precision, and undefined behavior.

C language type conversion

In C language, type conversion refers to converting the value of a data type Converts a value to another data type. It is mainly used for data manipulation and storage between different data types.

Type conversion method

C language has two main type conversion methods:

• Implicit type conversion:The compiler automatically performs conversion of low-precision type values ​​into high-precision types.
• Explicit type conversion: Manually specified by the programmer, the value of one type is converted to another type through the cast character (type).

Implicit type conversion

In implicit type conversion, the compiler automatically converts a low-precision type value to a high-precision type for processing Operation or assignment. For example:

int a = 5;
double b = a; //隐式转换为double

In this case, the integer value 5 of a is implicitly converted to the floating point value 5.0 of b.

Explicit type conversion

In explicit type conversion, the programmer uses the cast operator (type) to convert a value of one type into Convert to another type. For example:

int a = 5;
double b = (double) a; //显式转换为double

In this case, the integer value 5 of a is explicitly cast to the floating point value 5.0 of b.

Notes

When doing explicit type conversions, the following considerations need to be considered:

• Conversions may result in data loss if the target The type cannot hold a value of the source type.
• Conversion may result in reduced precision if the target type is less precise than the source type.
• Some type conversions can cause undefined behavior, such as converting a pointer to an integer.

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