2021年12月24日
C++ ofstream write content to file.ifstream read content from file
摘要： #include <iostream>#include <fstream>#include <uuid/uuid.h>#include <ctime>#include <unistd.h>#include <sstream> static char *uuidValue = (char *)mall 阅读全文
posted @ 2021-12-24 17:31 FredGrit 阅读(40) 评论(0) 推荐(0)
c++ get file size via ifstream and set mode as ios::ate
摘要： void getSize21() { ifstream wFile; wFile.open("log3.txt",ios::ate); if(!wFile.is_open()) { cout<<"Open log3.txt failed!"<<endl; } streampos size; size 阅读全文
posted @ 2021-12-24 16:38 FredGrit 阅读(57) 评论(0) 推荐(0)
C++ detect valid character and cout valid character via isalpha(ch) method
摘要： void getchar14() { char ch; while (1) { ch = getchar(); if(isalpha(ch)) { cout << "ch=" << ch << endl; } } } 阅读全文
posted @ 2021-12-24 15:41 FredGrit 阅读(30) 评论(0) 推荐(0)