Answers for "how does variadic arguments work"

Go
0

variadic parameters

package main

import "fmt"

func sum(n ...int) (s int) {
	for _, v := range n {
		s += v
	}
	return
}

func main() {
	fmt.Print(sum(1, 2, 3, 4))
}
Posted by: Guest on June-08-2021
0

how to acsess variadic arguments

#include <stdio.h>
#include <stdarg.h>
 
void simple_printf(const char* fmt,...)
{
    va_list args;
    va_start(args, fmt);
 
    while (*fmt != '') {
        if (*fmt == 'd') {
            int i = va_arg(args, int);
            printf("%dn", i);
        } else if (*fmt == 'c') {
            // note automatic conversion to integral type
            int c = va_arg(args, int);
            printf("%cn", c);
        } else if (*fmt == 'f') {
            double d = va_arg(args, double);
            printf("%fn", d);
        }
        ++fmt;
    }
 
    va_end(args);
}
 
int main(void)
{
    simple_printf("dcff", 3, 'a', 1.999, 42.5); 
}
Posted by: Guest on March-01-2021

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