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Function prototype: Difference between revisions
→{{header|C}}
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Function prototypes are typically included in a header file at the beginning of a source file prior to functional code. However, this is not enforced by a compiler.
<lang c>int noargs(void); /* Declare a function with no
int twoargs(int a,int b); /* Declare a function with
int twoargs(int ,int); /* Parameter names are optional in a prototype definition */
int anyargs(
int atleastoneargs(int, ...); /* One mandatory integer argument followed by varargs */</lang>
=={{header|C++}}==
Function declaration in C++ differs from that in C in some aspect.
<lang cpp>int noargs(); // Declare a function with no arguments that returns an integer
int twoargs(int a,int b); // Declare a function with two arguments that returns an integer
int twoargs(int ,int); // Parameter names are optional in a prototype definition
int anyargs(...); // An ellipsis is used to declare a function that accepts varargs
int atleastoneargs(int, ...); // One mandatory integer argument followed by varargs
template<typename T> T declval(T); //A function template
template<typename ...T> tuple<T...> make_tuple(T...); //Function template using parameter pack (since c++11)
</lang>
=={{header|COBOL}}==
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