_putw
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Header File
stdio.h
Category
Input/output Routines
Prototype
int _putw(int w, FILE *stream);
Description
Writes an integer on a stream.
_putw outputs the integer w to the given stream. _putw neither expects nor causes special alignment in the file.
Return Value
On success, _putw returns the integer w. On error, _putw returns EOF. Because EOF is a legitimate integer, use ferror to detect errors with _putw.
Example
#include <stdio.h> #include <stdlib.h> #define FNAME "test.$$$" int main(void) { FILE *fp; int word; /* place the word in a file */ fp = fopen(FNAME, "wb"); if (fp == NULL) { printf("Error opening file %s\n", FNAME); exit(1); } word = 94; putw(word,fp); if (ferror(fp)) printf("Error writing to file\n"); else printf("Successful write\n"); fclose(fp); /* reopen the file */ fp = fopen(FNAME, "rb"); if (fp == NULL) { printf("Error opening file %s\n", FNAME); exit(1); } /* extract the word */ word = getw(fp); if (ferror(fp)) printf("Error reading file\n"); else printf("Successful read: word = %d\n", word); /* clean up */ fclose(fp); unlink(FNAME); return 0; }
Portability
POSIX | Win32 | ANSI C | ANSI C++ |
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