为函数编写替换函数,该函数采用可变数量的参数(c编程)

#include<stdio.h>
#include <stdarg.h>

double average(int num, ...) {
    va_list args;
    double sum = 0.0;
    int i;

    va_start(args, num);
    for (i = 0; i < num; i++) {
        sum += va_arg(args, int);
    }
    va_end(args);

    return sum / num;
}

int main() {
    printf("Average: %.2f\n", average(3, 1, 2, 3));
    printf("Average: %.2f\n", average(4, 4, 5, 6, 7));
    return 0;
}