memset(arr,0x80,sizeof(arr));//set int to -2139062144memset(arr,0x7F,sizeof(arr));//set double to 1.38242e+306memset(arr,0xFE,sizeof(arr));//set double to -5.31401e+303 1. 函数介绍 包含头文件:#include<string.h>; 函数原型: void *memset(void *s , int ch , size_t n ); ...