| 词条 | dup |
| 释义 | § 解释 函数名: dup 功 能: 复制一个文件句柄 用 法: int dup(int handle); § 程序例 #include <string.h> #include <stdio.h> #include <conio.h> #include <io.h> void flush(FILE *stream); int main(void) { FILE *fp; char msg【】 = "This is a test"; /* create a file */ fp = fopen("DUMMY.FIL", "w"); /* write some data to the file */ fwrite(msg, strlen(msg), 1, fp); clrscr(); printf("Press any key to flush \\ DUMMY.FIL:"); getch(); /* flush the data to DUMMY.FIL without closing it */ flush(fp); printf("\File was flushed, Press any \\ key to quit:"); getch(); return 0; } void flush(FILE *stream) { int duphandle; /* flush TC's internal buffer */ fflush(stream); /* make a duplicate file handle */ duphandle = dup(fileno(stream)); /* close the duplicate handle to flush the DOS buffer */ close(duphandle); } |
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