?? file.cc
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#include <iostream>using namespace std;#include <sys/types.h>#include <sys/stat.h>#include <fcntl.h>#include <unistd.h>#include <cstring>int main(){ char* username = getlogin(); if(strcmp(username,"openlab")==0){ cout << "別搗亂啦" << endl; return 0; } int fd = open("luck",O_WRONLY|O_CREAT|O_EXCL, 0644); if(fd<0){ cout << "失敗!" << endl; return -1; } cout << "成功!" << endl; write(fd, username, strlen(username)); close(fd);}?? 快捷鍵說明
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