C/C++——С±à̸CÓïÑÔº¯ÊýÄÇЩÊÂ(6)
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1. fcloseº¯Êý
fcloseº¯ÊýµÄ¹¦ÄÜÊǹرÕÒ»¸öÁ÷£¬ÆäÓ÷¨ÊÇ£ºint fclose(FILE *stream); ³ÌÐòÀý×ÓÈçÏ£º
#include <string.h>
#include <stdio.h>
int main(void)
{
FILE *fp;
char buf[11] = "0123456789";
/* create a file containing 10 bytes */
fp = fopen("DUMMY.FIL", "w");
fwrite(&buf, strlen(buf), 1, fp);
/* close the file */
fclose(fp);
return 0;
}
2. fcloseallº¯Êý
fcloseallº¯ÊýµÄ¹¦ÄÜÊǹرմò¿ªÁ÷£¬ÆäÓ÷¨ÊÇ£ºint fcloseall(void); ³ÌÐòÀý×ÓÈçÏ£º
#include <stdio.h>
int main(void)
{
int streams_closed;
/* open two streams */
fopen("DUMMY.ONE", "w");
fopen("DUMMY.TWO", "w");
/* close the open streams */
streams_closed = fcloseall();
if (streams_closed == EOF)
/* issue an error message */
perror("Error");
else
/* print result of fcloseall() function */
printf("%d streams were closed.\n", streams_closed);
return 0;
}
3. fcvtº¯Êý
fcvtº¯ÊýµÄ¹¦ÄÜÊÇ°ÑÒ»¸ö¸¡µãÊýת»»Îª×Ö·û´®£¬ÆäÓ÷¨ÊÇ£ºchar *fcvt(double value, int ndigit, int *decpt, int *sign); ³ÌÐòÀý×ÓÈçÏ£º
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
int main(void)
{
char *string;
double value;
int dec, sign;
int ndig = 10;
clrscr();
value = 9.876;
string = ecvt(value, ndig, &dec, &sign);
printf("string = %s
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