Which of the following declarations for a function is valid and legal in c++?
select one:
a. void foo
b. all of the choices listed are valid c++ function declarations
c. int foo( char x );
d. none of the choices listed is a valid c++ function declaration
e. foo( int a, int b );

c. int foo( char x );

Explanation:

Among the given options:

int foo( char x );

is a valid function declaration which declares a function with the name foo which takes a single character argument x and returns an integer data type.

Option a (void foo) does not specify the arguments off the function while option e  (foo( int a, int b );) does not specify the return type.Hence these are incomplete function declarations.

plot immersion i am not fully sure with it though