摘要： #include <stdio.h>#include <stdarg.h>/* 该函数ret = min(size, 实际写入长度) - 1，即ret永远小于size * scnprintf(NULL, ...) -> segment err * scnprintf(str, 0, ...) -> -1 * scnprintf(str, 1, ...) -> 0 * scnprintf(str, size, "%s", NULL) <==> scnprintf(str, size, "%s", &qu 阅读全文