利用可变参数列表
#include<stdio.h>#include<stdarg.h>int average(int n, ...){ va_list arg; int i = 0; int sum = 0; va_start(arg, n); for (i = 0; i < n; i++) { sum = sum + va_arg(arg, int); } return sum / n; va_end(arg);}int main(){ int a = 1; int b = 2; int c = 3; int avg1 = average(2, a, c); int avg2 = average(3, a, b, c); printf("%dn", avg1); printf("%dn", avg2); return 0;}