C Tutorial/stdio.h/fprintf
fprintf
Item Value Header
- include <stdio.h>
Declaration int fprintf(FILE *stream, const char *format, ...); Function outputs the values to the stream. Return returns the number of characters actually printed on success or a negative number on failure.
The format control string are identical to those in printf();
#include <stdio.h>
#include <stdlib.h>
int main(void)
{
FILE *fp;
if((fp=fopen("test", "wb"))==NULL) {
printf("Cannot open file.\n");
exit(1);
}
fprintf(fp, "this is a test %d %f", 10, 20.01);
fclose(fp);
return 0;
}