CFileStream stm;if(stm.OpenFileForReading(hFile, wszFileName)) { IPersistStream* pPerStream; hr = CJavaClassFile::CreateInstance(NULL, IID_IPersistStream, (LPVOID*)&pPerStream);if(hr == S_OK) { hr = pPerStream->Load(&stm);// load the class fileif(hr == S_OK) { IInsertSig...
写入字符串 int fputs( const char *string, FILE *stream ); string:要写入的字符串 stream:一次读取的大小 例: 代码语言:javascript 复制 char buf[10] = { 0 }; FILE *pf = fopen("file.txt", "r"); if (pf == NULL) { perror("open file for reading"); exit(0); } fgets(buf, 9, ...
FILE *infile; struct rawdata data_arr[BLOCKMAX]; for (long i=0; i< FRAMEINBLOCK; i++) { data_arr->frame0[i] = 0 ; } // Open .dat for reading infile = fopen ("rawdata.dat", "r"); if (infile == NULL) {fprintf(stderr, "\nError opening file\n"); exit (1); } frea...
rb : open for reading in binary mode w : open for writing wb : open for writing in binary mode r+ : support read and write. the file must exit. w+ : it like r+ funciton that will recover the file with same file name if file name exit.*/ w/r 就很簡易的只是 : 只能讀 / 只...
rOpen for reading.If the file does not exist,fopen()returns NULL. rbOpen for reading in binary mode.If the file does not exist,fopen()returns NULL. wOpen for writing.If the file exists, its contents are overwritten. If the file does not exist, it will be created. ...
文件的打开操作表示返回一个指向制定文件的FILE 结构体。我们需要指定文件位置和操作方式,特别需要注意的是区分不同的文件操作方式将会产生的结果。 1 2 3 4 5 6 7 8 9 10 11 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. r Open text file for reading. The stream is positioned at the beginning...
For the modes where both read and writing (or appending) are allowed (those which include a"+"sign), the stream should be flushed (fflush) or repositioned (fseek,fsetpos,rewind) between either a reading operation followed by a writing operation or a writing operation followed by a reading ...
文件 fp = fopen("example.txt", "r"); if (fp == NULL) { perror("Error opening file"); return(-1); } // 尝试从文件中读取字符 while ((ch = fgetc(fp)) != EOF) { printf("%c", ch); } // 检查是否因为错误而结束读取循环 if (ferror(fp)) { printf("Error reading from file...
The file descriptor underlying stream is invalid, or not open for reading. EILSEQ Input byte sequence does not form a valid character. EINTR The read operation was interrupted by a signal. EINVAL Not enough arguments; or format is NULL. ENOMEM Out of memory. ERANGE The result of an integer...
open 函数可以打开或创建一个文件。include <sys/types.h> include <sys/stat.h> include <fcntl.h> int open(const char *pathname, int flags);int open(const char *pathname, int flags, mode_t mode);返回值:成功返回新分配的文件描述符,出错返回-1并设置errno 在Man Page中open 函数有...