What is the correct way to declare a function that takes two integers as parameters and returns their sum?

int sum(int a, int b) { return a + b; }
int sum(int a; int b) { return a + b; }
sum(int a, int b) { return a + b; }
void sum(int a, int b) { cout << a + b; }

Functions in C++ are declared by specifying their return type, followed by the function name and parameters enclosed in parentheses. The correct way to declare a function that takes two integers and returns their sum is by declaring the return type as int and specifying the parameters with commas in between. So, the correct declaration is int sum(int a, int b).

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