摘要：默认参数 #include <stdio.h> #define VA_NUM_ARGS_IMPL(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, \ a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, 阅读全文