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Standard C Libraries
fgets
Description:
Include:
Prototype:
Get a string from a stream
<stdio.h>
char *fgets(char * s , int n , FILE * stream );
Arguments:
s
n
stream
pointer to the storage string
maximum number of characters to read
pointer to the open stream.
Return Value:
Remarks:
Example:
? 2008 Microchip Technology Inc.
Returns a pointer to the string s if successful; otherwise, returns a null
pointer
The function reads characters from the input stream and stores them
into the string pointed to by s until it has read n-1 characters, stores a
newline character or sets the end-of-file or error indicators. If any char-
acters were stored, a null character is stored immediately after the last
read character in the next element of the array. If fgets sets the error
indicator, the array contents are indeterminate.
#include <stdio.h> /* for fgets, printf, */
/* fopen, fclose, */
/* FILE, NULL */
#define MAX 50
int main(void)
{
FILE *buf;
char s[MAX];
if ((buf = fopen("afile.txt", "r")) == NULL)
printf("Cannot open afile.txt\n");
else
{
while (fgets(s, MAX, buf) != NULL)
{
printf("%s|", s);
}
fclose(buf);
}
}
Input:
Contents of afile.txt (used as input):
Short
Longer string
Output:
Short
|Longer string
|
DS51456E-page 55
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相关PDF资料
SW006015
C COMPILER MPLAB C32
SW300003-EVAL
LIBRARY SOFT MODEM-EVAL ONLY
SW300010-EVAL
SPEECH RECOG LIBRARY-EVAL ONLY
SW300040-EVAL
LIBRARY NOISE SUPPR-EVAL ONLY
SW300060-EVAL
LIBRARY ACOUSTIC ECHO-EVAL ONLY
SW300070-EVAL
SOFTWARE LIBR ENC/DEC EVAL ONLY
SW500012
HI-TECH C PRO FOR PIC32
SY87701LHI-EVAL
BOARD EVAL SY87701 EXPERIMENT
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