requires ANSI-style prototype

ANSI-style prototype refers to a function declaration that specifies the data types of the function's parameters. It includes the function name, return type, and the data types and names of the parameters enclosed in parentheses.

For example, the ANSI-style prototype for a function named "add" that takes two integers as parameters and returns an integer would be:

int add(int num1, int num2);

The "requires ANSI-style prototype" error message usually occurs when a function is called without a proper function prototype. This means that the compiler is unable to check if the function is being called correctly, leading to potential errors or unexpected behavior. To fix this error, make sure to include the function prototype before calling the function.