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The return value type of a function declares the value type that the function will return to avoid type mismatches and errors. Determining the return value type takes into account the function's purpose, operation, calling code, and reusability. Optional primitive types, structures, classes, pointers, and references as return value types.
C The return value type of a function
In C, the return value type of a function declares what type the function will return value. When we define a function, we need to specify the data type it will return. This ensures that functions always return values of the expected type and avoids type mismatches and runtime errors.
Determine the return value type
When determining the function return value type, you need to consider the following factors:
Selection of return value type
There are various data types in C that can be used for function return values, including:
##Practical combat Case
The following is an example of a function that finds the maximum of two numbers:int max(int a, int b) { if (a > b) { return a; } else { return b; } }In this example, the function returns a value of type int, because the input value and the expected return value All are integers.
Conclusion
The correct choice of the return value type of a function is very important because it ensures the correctness and maintainability of the code. By considering the purpose of the function and the operations it performs, we can choose an appropriate return value type to meet the needs of our code and avoid potential problems.The above is the detailed content of How to determine the return value type of a C++ function?. For more information, please follow other related articles on the PHP Chinese website!