Use C fwrite function to objects to a file
Syntax
C fwrite function has the following syntax.
size_t fwrite(const void *buf, size_t size, size_t count, FILE *stream);Header
C fwrite function
is from header file stdio.h.
Description
C fwrite function writes count number of objects and
returns the number of items written on success. Fewer items written means failure.
Example
Write objects to a file using C fwrite function.
#include <stdio.h>
#include <stdlib.h>
/* w w w. ja v a 2s. c om*/
int main(void)
{
FILE *fp;
float f=12.23;
if((fp=fopen("test", "wb"))==NULL) {
printf("Cannot open file.\n");
exit(1);
}
fwrite(&f, sizeof(float), 1, fp);
fclose(fp);
return 0;
}
Example 2
#include <stdio.h>
//from w w w . j a va 2s .co m
int main ()
{
FILE *file;
char str[] = "This buffer contains 34 characters";
file = fopen ("my.txt" , "w");
fwrite (str , 1 , 34 , file);
fclose (file);
return 0;
}