C/C++ 文件读写操作

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标准C++ 读写文件内容：

//C 语言实现 读取文件内容 ( 仿PHP ) 2012-6-25 by Dewei//用法：string s = file_get_contents("C:\\LICENSE.txt");string file_get_contents(const string &filename)  {  string contents;  FILE *fp;  fp = fopen(filename.c_str() , "rb");  if (fp == NULL) {  fclose(fp);  return "";  }  fseek(fp, 0, SEEK_END);  int file_size = ftell(fp);  char *tmp;  fseek(fp, 0, SEEK_SET);  tmp =  (char *)malloc(file_size+1);  memset(tmp, 0, file_size+1);  fread(tmp, sizeof(char), file_size, fp);  if (!ferror(fp)) {  /* now, it is an error on fp */   }  fclose(fp);  contents = tmp;  free(tmp);  return contents;  }  //C 语言实现 写入文件内容 ( 仿PHP ) 2012-6-25 by Dewei//用法：file_put_contents("C:\\LICENSE.txt", "写入内容");bool file_put_contents(const string &filename, const string contents){FILE *fp;fp = fopen(filename.c_str() , "wb");if (fp == NULL) {return false;}fwrite(contents.c_str(), contents.length(), 1, fp);fclose(fp);return true;}