直接上代码:
#include <iostream> #include <string> #include <vector> #include <fstream> bool ReadFile(std::string& strFile, std::vector<char>& buffer) { std::ifstream infile(strFile.c_str(), std::ifstream::binary); if (!infile.is_open()) { printf("Read File:%s Error ... \n", strFile.c_str()); return false; } // 获取文件大小 infile.seekg(0, std::ifstream::end); long size = infile.tellg(); infile.seekg(0); buffer.resize(size); printf("文件:[%s] 共有:%ld(字节) ..... \n", strFile.c_str(), size); // read content of infile infile.read(&buffer[0], size); infile.close(); return true; } bool WriteFile(std::string& strFile, std::vector<char>& buffer) { std::ofstream outfile(strFile.c_str(), std::ifstream::binary); if (!outfile.is_open()) { printf("Write File:%s Error ... \n", strFile.c_str()); return false; } outfile.write(&buffer[0], buffer.size()); outfile.close(); return true; } void test1126_222() { std::string oldFile = "test.txt"; std::vector<char> buffer; if (ReadFile(oldFile, buffer)) { std::string newFile("test_new.txt"); if (WriteFile(newFile, buffer)) { printf("备份文件 %s --> %s 成功 ... \n", oldFile.c_str(), newFile.c_str()); } } } int main() { test1126_222(); return 0; }