variable variable parameters c

C ++ supports parameters have default parameters, parameter placeholders, variable parameters:

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h> // must be the header file function to get the parameters of this header file in

// C ++ function in the variable parameter
// will prompt the user to pass the API parameter types
void func_param (int A, ...) {
    // Get variable parameters
    // pointer variable parameter defines
    the va_list args_p;
    // first specified variable parameters start position, the start position, using the pointer, refers to all the way down, taken out one by one
    the va_start (args_p, a);
    // Get a number (in order of reading)
    // first argument of type int
    int arg_int = the va_arg (args_p, int);
    the printf ( "the first parameter:% D \ n-", arg_int);
    
    // second parameter char type
    char arg_char = va_arg (args_p, char );

    printf ( "the second parameter: C% \ n-", arg_char);
    
    // third parameter type double
    double arg_float = va_arg (args_p, double );

    printf ( "third argument:% f \ the n-", arg_float);
    
    // end
    va_end (args_p);

}

****************************************************

void main(){
    func_param(3, 40, 'A', 45.3);

    system("pause");
}